Gotta agree with Skylane42 here, THe main purpose for nylon is so that it will break. For my own planes I have no problem using blind nuts and steel screws. If I rip the gear off, I probably have other, more serious repairs to make as well. However, as an instructor for a local youth aviation program, where landings are sometimes measured by the damage done and landing gear repairs are common, I recommend (assuming flat stock gear being used), attaching with wood screws. They hold up fine under normal conditions (and we have a very rough runway) but do minimal damage to the plane during the occasional harrier landing. The screws tend to pull out of the wood rather than pull the wood off the plane. I also agree with minnflyer about practicing your landings. Nylon should hold up to even moderately hard landings