You shouldn't have any problems with that rda on any mod.this is what my current is like...
If you like the limitless, check out the AV mods, most, if not all if them are direct to battery. Kindbright also clones AV mods, I'm using a Time Keeper now.
I know its brass and copper, but it matches my .38 bullets
I'm waiting on my brass Goon from 3f