Big Dragon 3

Wing band tension. It depends on what kind of flying you intend to do.
For a low-time student, as many bands as you can get on, as tight as you can get them, so the wing cannot move during the probable wild gyrations and 25G pull-ups!
For an initial test-glide with lightweight construction, just enough to hold the wing in place when you gently bounce it by the wings, so a 'chinese' arrival will knock the wing off without breaking anything.
Modern elastic bands are rubbish. I use big heavy ones on the Phoenix trainer, and I might get two weekends out of them before they start to fail. I had one fail in between flights, the other week. The model was on the ground, and I was sitting under my sunbrella, when I heard a rattling noise. When I looked, one of the six 1cm x 20cm bands (unstretched length) had let go.
The white silicon? ones are worse. after a couple of stretches, they wrinkle up and then snap.
Once the flier is competent, and the model is trimmed and good, wing bolts are better, because they are more positive in location, but not forgiving if the ground jumps up and hits the model!

Whatever bands you use, ultra-violet (sunlight) degrades them rapidly.

Heat also degrades them, about two years tops, and that's stored inside!
Nylon securing screws work really well, and break if you over do it.

Yes - they were rather loud! Especially at 0405, when we were trying to sleep after doing the 'middle' watch (midnight to 4am).
I forget the exact words I used, but in my book "Sea Story" (cheeky plug) I described it along the lines of  -
screeeeEEEEEWHUMPBZZZZzzzzz
as the arrester wire spooled out.

Mid August - and it was that cold last night that my heating turned itself on! 

I have some APC 10 x 6 e props, if that helps?

Printing bands is easily done Jon, the sizing is a bit 'hit and miss', they stretch, but not a lot. I had to print bands for the Big Bobber suspension.