This is a rather unique REO problem I thought I would post here to see if anyone has any ideas...... The Subject:45+ smoker PAD. Vaper for 2 years, exclusively the last 18 months. Absolute MTL vaper.The Hardware: REO (Grand) with RM2 running 1.2 ohms. Air hole at 1/16. ReadyXwick. OliveR with RM2 running 1.2 ohms. Air hole at 1/16. ReadyXwick. Joytech eGrip running ~8W. (This is btw, the absolute best, IMHO, device for a new user. With the announcement of a RBA for this device, it gets even better, and can provide a path to transition vapers.)The Problem: When I first began vaping, I had difficulties with Nic in any levels greater than 12mg. (The heart medications I am on cause heartburn, so I am always on the verge of severe problems. I was prescribed Omeprazole, which I take religiously.) I would get immediate severe heartburn. It did not matter the manufacturer, device, flavor or pg/vg ratio. I would get the heartburn just by test vaping in the shop. So, all things considered, I settled on 6mg of Nicotine. Fast forward two years to today. I am now experiencing this severe heartburn when vaping on my REO (only). I am using the exact same juice (from the same bottle) in all three devices. The batteries (18650) are AW IMR. all purchased at the same time, and used interchangeably between the REO and OliveR. Only when I vape off of the REO do I experience this heartburn. I can also state that the REO hits harder than the other two devices. (Which must be a design difference between the REO and the OliveR, as they are set up identically.) When dry burning my coils, I can also visually see that the coil heats up hotter and faster in the REO than the OliveR. (I do not dry burn the eGrip.) The coils are made the exact same way for the last 18 months or so, using the exact same wire off of the same spool. Both coils measure the same with my Multimeter, and are placed on the RM2 identically. The temperature of the vapor is the same between the REO and the OliveR. (Obviously since the eGrip is running a slightly lower wattage atomizer, it is a slightly cooler vape.) Not that it matters (in this instance), but I am running High VG (80-95%) juice. This difficulty has be coming on slowly, and has only been noticeable (and trackable) in the last 3 months. I am beginning to think that I either need to lower my Nic again, or raise the resistance of the coil for the REO. ETA: Does anyone have any ideas? If not, which of the two that I offered would you recommend and why?