RE: rubber bands for wing hold
it's not waste. Waste is what happens when you re-use rubber bands that have lost their elasticity and fail in flight.
I thought I had a box full of good, fresh rubber bands, so I put 10 of them on my trainer and put it up. When I landed, four of them had broken. I looked over all 10 of them. The fresh ones were obvious, the not so fresh ones were too.. Can you guess what ones they were?
It's just not worth it.
CGr.