I like bolt on wing better too, but on a trainer, I like the flexibility the rubber bands provide in a cartwheeling or wing tip landing. It can save some damage to the wing.

I use the rubber bands until they crack or break, but I do use a couple extra every time. It seems like one or two break when I take them off, so they are constantly being changed out. I like the kitty litter/corn starch in a can idea and may adopt it.

Thanks,

jack