At well over 2000 posts this is quite a long thread so instead of trying to search through it I thought I'd go away and ask 
I have an Echo-E kit which is manual batteries at 1100mah with 510 threading and I have been experiencing battery contact issues - the only devices which reliably work on these batteries for me are echomizers and CE3s (if you can use the word "reliable" as far as CE3s are concerned). I've tried a number of EMDCCs on them and it's a hit and miss (mostly miss), Boge LR cartoes, no-name 510 cartos, LR attys, NR attys, Ego-T attys, you name it, they just won't fire and no amount of post pulling seems to help. I wonder if this is a wide spread issue and if there's a solution available, or I just happened to get a kit from a not-so-great batch and just have to stick with echomizers and get another 510 battery for all my other 510 devices?
I have an Echo-E kit which is manual batteries at 1100mah with 510 threading and I have been experiencing battery contact issues - the only devices which reliably work on these batteries for me are echomizers and CE3s (if you can use the word "reliable" as far as CE3s are concerned). I've tried a number of EMDCCs on them and it's a hit and miss (mostly miss), Boge LR cartoes, no-name 510 cartos, LR attys, NR attys, Ego-T attys, you name it, they just won't fire and no amount of post pulling seems to help. I wonder if this is a wide spread issue and if there's a solution available, or I just happened to get a kit from a not-so-great batch and just have to stick with echomizers and get another 510 battery for all my other 510 devices?