I ended up putting fiber tape under the tail and under the wingtips to protect them on landings. My guess is like most people you will need that protection.

I didn't start out with the triangular stock on the tail, but ended up with it after a relatively minor run off the runway jarred it loose. You might consider that as well.

The instruction manual says the engine compartment is already treated, but it didn't look like it so I treated it with epoxy thinned with alchohol.

I think the nylon screws are an upgrade. It would have to be a pretty nasty accident for the rubber bands to do any good.