Got the RBA!
It is the same size and look as the 1.2 stock coils. Deck is then the inside diameter of the stock coils, very small. Your coil needs to be 1m ID, 30 gauge (maybe 28 at most). I am visually impaired and use lighted magnifying lamps and other aids to build on even a regular size deck. I no longer drive, and glasses don’t help with my condition. Had to adjust a few times to eliminate shorts. Took me a while, but I did it
How does it vape? Great! My coil is a little over 1 ohm, wicked with cotton bacon, and of course my DIY unflavored 70pg/30vg 12mg, 12 watts. Vape is like the stock 1.2 but thicker and fuller. Very satisfying and so far is wicking nicely.
Glad I spent the $8 to try it, and with good eyesight it would be very doable. Believe me, if I can do it, you can with ease.