I'm using 1/8" FG also but maybe the combo of the rod and the bi-di and the coro makes it just durable enough to bounce the props off so far, knock on wood
When I started using LE rods I was glueing them in but that didn't work as well. Now when I go wing to wing the LE just flexes back a bit then bounces back out to shape. The tape and rod combo spreads the impact along the LE and I rarely break the spar.
Not going to Nats, Paris was my big trip for this year again. I've got enough people bugging me to go I just might have to start working towards going next year.
rrh