RE: Nylon Bolts
You're gonna want to use larger sized nylon bolts than metal ones that are supplied with the plane. I did the same on a 40 sized Twist, knocked out the stock anchor nuts and replaced them with I beleive 6-32. Then I bought out my LHS's stock of 6-32 nylon bolts and kept them in myt toolbox. I kept on knocking the gear off (was trying to learn harrier landings) but never had a problem when I flew and landed the plane "normally".
Oh and don't forget to stock up on props, too...
Andy