while you're tinkering with the RM2, the $25 HH357 is a fore runner of the Micro coil, sort of; tight wrapped lots of wraps for more surface area for the juice to vaporize… btw the $12 Aero is a spinoff of the 357 and more consistent imo… go LR of course for the Reo.
AW 1600 IMR is best for anything over .7 ohms; lasts a good long time and will drop off around 3.5v
btw you know Rob is building a sub ohms kit (pos pin and batt spring) … don't bother going lower ( i know you're not there yet ) because anything under .8 is going to give the stock Reo setup some trouble.
I know folks are doing it now anyway but i've killed a couple of springs and pos pin/button kits and am waiting for Robs new kit.