Al,
That looks like the Tower 60 trainer- same one I have. Cartwheeled it a few times and plowed it in in a landing and all I'll say is that I love rubber bands. The wing twists sideways and pops off and no damage.
I sometimes plow my sailplanes 2-4" into the earth (someday I'll learn to not make "one last turn" before landing). Rubber bands save them every time.

I use about 8 to 10 bands. I want enough tension where the wing won't change incidence under load, but not so much where I can't get some criss-cross movement when I push.

I bet at a 54mph spinner landing, it would crack-up anyway. The rubberbands just held the scraps together for you.