I rebuilt my protanks for my wife and I for almost 2 years and loved them until the subtank showed up at the house.
- as long as your jig fits into the slots of the protank head you can use it as a coil jig.
- I found 32 gauge too thin and once it dryburns a few times it gets weak and distorts easily. I made our PT coils with 30 gauge, IMO the 28 can be used but it requires too many wraps, gets too hot thus heating up the base, discoloring your juice faster and not enough airflow to support lower ohm builds even with a kanger airflow adapter thats been drilled out.
- I've been using the kanger subtank mini with its RBA and have had no issues with that atty at all
- very easy to build tootle puffer coil builds. I build my wife 1.4-1.6ohm builds in the subtank mini and she is a happy vaper, me on the other hand love my low ohm clapton builds.
- never bought prewound coils. I just build the coils I want.
Be sure you buy the spare orings and insulators for your protanks. Not the orings as much as the positive insulators, they dry up and get crispy after time and also if you dryburn the head too hot or have "hot legs" you will scorch and burn the insulator. Enjoy rebuilding your protanks, those protanks set the stage for me to have the confidence to recoil all my attys and have top shelf vape experience with ordinary gear.
Even with a brand new PT head, you remove the silica, replace it with cotton and the change in vape quality is outstanding.
I forgot to add is that I'm pretty sure the Davide and protank are interchangeable. I used a sigelei puritanks that is a davide clone and used all my protank parts along with the base. The davide holds more juice than the protank so thats why I liked them more than the protanks until they got broken and I had to go back to using the PT.
You might want to check on that. I think that Davide uses Aspire atty's and Protank uses Kanger attys.
Praying that the antibiotics have done their job and that you are getting better now. Reactions and side effects of medications are never fun to deal with. 