what RDA ? (I forgot)
and youre just doing a simple single coil ?
I take a file and scratch a groove where the coil wire falls
then when cap is on it is easy to line the air hole up with coil...
with cap off, I just drip juice on new dry wrap and count drops
1,2,3,4,5,6 till I see it saturated then after just drop a few to keep it wet...
make something up in your mind 2 drops, 10 puffs
it will all fall into place, its a lot of work