Let me start off by saying. I love this mod and believe in this company. I'm a loyal customer and will continue to be. Having said that, I feel like I should share this because when searching for answers, I didn't find a whole lot on ECF about MCR tech issues.
I purchased my MCR101 mod back in June. All SS, 18650 tube, flat top cop, ss button and switch assembly. Received it and within the week I began to have issues. It's not every single time O pick it up. Sometimes days go by without issues but then they creep up and I'm somewhat annoyed.
I AM NO EXPERT AND I AM JUST OFFERING MY EXPERIENCE.
Now we begin------
Main Issues: Magnets & Button Getting Stuck in Firing Position. Hot button.
-The mod has 3 small magnets in the switch assembly (12mm OD x 8mm ID x1 mm Thickness). I believe these magnets to be the reason. Since they are so thin, they attract each other on the very edge forming a zig-zag pattern down the button's pole (female insert for the negative pin) which would then cause the button to not be smooth, stick, etc. These magnets also getting stuck together might have something to do with the button overheating issue which has been huge with my mod. Maybe connecting a circuit, creating a short, something. Not sure on the science of it. Either way, the magnets heated up with the button and they became useless. One of them actually became magnetic on both sides.
Maybe the lock ring has something to do with it sticking? Who knows?
Getting tired of the song and dance, I emailed MCR with my issues. Liam from MCR sent a new button (just the button itself) and new magnets my way immediately. Talk about customer service!
It seemed to fix the problem but soon, it just happened again. Button hot, button getting stick in fire position to where you have to shake the mod or give the button a tap to stop it form firing, magnets getting stuck.... It was really frustrating.
I read two magnets might help. I tried using only two magnets, and same problem. Kinda worse.
Since MCR sent me more magnets, I tried experimenting with them. The best solution that has the best results was sticking two magnets together on both opposing sides (4 total, practically two at 2mm thick) and that seemed to work great. Also having two stuck together and opposing only one seemed to work. But, the latter would get stuck together every once in a while. Only issue with the 4 magnet set-up.... The negative pin barely came up higher than the delrin insulator in the switch assembly. Pressure was needed but at least I could vape without trouble shooting the hell out of it. And yes, I couldn't tell you how many times I cleaned this sucker and make sure all connections were tight. I read, I sought answers, I really did. I just wasn't coming up with much results. "Were these mods not made for low resistance vaping?" I could even feel the hot button with a .7 ohm build on my kayfun. A dripper at .3 ohms got taken off pretty quickly. Also, using song VTC5's & Song VTC4's. I read somewhere these were designed for AW IMR batteries. This seems really weird to me. "Designed for a certain battery? Are you serious?"
I enjoy tinkering with my mods but this was becoming a hassle. I didn't pay a ton of money to get a crash course in modding. The price sounds great in GBP but when converted to USD...... Man. I paid to avoid this stuff.
It seems bad but I was embarrassed. I spent so much on this mod and my cruddy old random clones were not having this issue. My friends who made fun of me when I purchased it.... I wanted to selfishly have the better mod. I was losing, though. What the hell, right? This is an MCR! A gorgeous high-end mod that has only given me issues. But, when she performs, boy does she perform. It's probably why I've stuck with it for so long and will continue to stick with it. I've heard so many success stories but my story is different. Again, just frustrating. The threads on the mod seem perfect but I don't have anything to compare it to. I also have too much money invested to call it quits. Did I receive a lemon? Maybe, who knows. The percentage is probably small but it would be ignorant to say it isn't possible.
2nd Issue: Contact Pin.
I don't even know if this matters but it seems like the contact pin touching the positive end of the battery could have more surface area. It's just so small and since the screw leading from it is so thin, it seems frail. Maybe it's not getting its flush connection that is needed. It probably doesn't matter. I, as a consumer, would just have better piece of mind eliminating any variables.
Silver Lining-
I've contacted more than a few magnet manufacturer's and finally found a company that will be making some magnets to my specifications needed for the mod. I'm pretty excited about it and If it doesn't fix anything, that's okay. My magnet issues have been completely reoccurring. Either they stick together at the edge, or lose their magnetism strength. I don't know the grade but MCR might want to look into upgrading their magnet design to something thicker and something that can withstand a higher degree. Just in case a hot button occurs.
MCR is growing and new designs are coming out. I'm very excited to see how this company evolves. I want some Hiduron pieces so bad. That metal looks incredibly beautiful.
Feel free to leave thoughts or just discuss MCR mods. I'm cool with either. Just looking to attract some MCR owners who have maybe experienced the same issues or have some tips. Post pictures of your set-up, too. I love to see these!

I purchased my MCR101 mod back in June. All SS, 18650 tube, flat top cop, ss button and switch assembly. Received it and within the week I began to have issues. It's not every single time O pick it up. Sometimes days go by without issues but then they creep up and I'm somewhat annoyed.
I AM NO EXPERT AND I AM JUST OFFERING MY EXPERIENCE.
Now we begin------
Main Issues: Magnets & Button Getting Stuck in Firing Position. Hot button.
-The mod has 3 small magnets in the switch assembly (12mm OD x 8mm ID x1 mm Thickness). I believe these magnets to be the reason. Since they are so thin, they attract each other on the very edge forming a zig-zag pattern down the button's pole (female insert for the negative pin) which would then cause the button to not be smooth, stick, etc. These magnets also getting stuck together might have something to do with the button overheating issue which has been huge with my mod. Maybe connecting a circuit, creating a short, something. Not sure on the science of it. Either way, the magnets heated up with the button and they became useless. One of them actually became magnetic on both sides.
Maybe the lock ring has something to do with it sticking? Who knows?
Getting tired of the song and dance, I emailed MCR with my issues. Liam from MCR sent a new button (just the button itself) and new magnets my way immediately. Talk about customer service!
I read two magnets might help. I tried using only two magnets, and same problem. Kinda worse.
Since MCR sent me more magnets, I tried experimenting with them. The best solution that has the best results was sticking two magnets together on both opposing sides (4 total, practically two at 2mm thick) and that seemed to work great. Also having two stuck together and opposing only one seemed to work. But, the latter would get stuck together every once in a while. Only issue with the 4 magnet set-up.... The negative pin barely came up higher than the delrin insulator in the switch assembly. Pressure was needed but at least I could vape without trouble shooting the hell out of it. And yes, I couldn't tell you how many times I cleaned this sucker and make sure all connections were tight. I read, I sought answers, I really did. I just wasn't coming up with much results. "Were these mods not made for low resistance vaping?" I could even feel the hot button with a .7 ohm build on my kayfun. A dripper at .3 ohms got taken off pretty quickly. Also, using song VTC5's & Song VTC4's. I read somewhere these were designed for AW IMR batteries. This seems really weird to me. "Designed for a certain battery? Are you serious?"
I enjoy tinkering with my mods but this was becoming a hassle. I didn't pay a ton of money to get a crash course in modding. The price sounds great in GBP but when converted to USD...... Man. I paid to avoid this stuff.
It seems bad but I was embarrassed. I spent so much on this mod and my cruddy old random clones were not having this issue. My friends who made fun of me when I purchased it.... I wanted to selfishly have the better mod. I was losing, though. What the hell, right? This is an MCR! A gorgeous high-end mod that has only given me issues. But, when she performs, boy does she perform. It's probably why I've stuck with it for so long and will continue to stick with it. I've heard so many success stories but my story is different. Again, just frustrating. The threads on the mod seem perfect but I don't have anything to compare it to. I also have too much money invested to call it quits. Did I receive a lemon? Maybe, who knows. The percentage is probably small but it would be ignorant to say it isn't possible.
2nd Issue: Contact Pin.
I don't even know if this matters but it seems like the contact pin touching the positive end of the battery could have more surface area. It's just so small and since the screw leading from it is so thin, it seems frail. Maybe it's not getting its flush connection that is needed. It probably doesn't matter. I, as a consumer, would just have better piece of mind eliminating any variables.
Silver Lining-
I've contacted more than a few magnet manufacturer's and finally found a company that will be making some magnets to my specifications needed for the mod. I'm pretty excited about it and If it doesn't fix anything, that's okay. My magnet issues have been completely reoccurring. Either they stick together at the edge, or lose their magnetism strength. I don't know the grade but MCR might want to look into upgrading their magnet design to something thicker and something that can withstand a higher degree. Just in case a hot button occurs.
MCR is growing and new designs are coming out. I'm very excited to see how this company evolves. I want some Hiduron pieces so bad. That metal looks incredibly beautiful.
Feel free to leave thoughts or just discuss MCR mods. I'm cool with either. Just looking to attract some MCR owners who have maybe experienced the same issues or have some tips. Post pictures of your set-up, too. I love to see these!

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