I don't suggest a steel bolt !!!! That's a good way to really mess up a good plane. I have flown ARC planes for years and have only had to replace one bolt and that was because I caught a wing tip and twisted the wing around and streached the bolt. If you put metal ones in you will most likely end up tearing out some of the interior structure.

I hate to rain on some of your parades but ARC puts out a GREAT plane if you don't try to fix it your way. Ever hear the saying " if it works don't fix it ". Put their planes togeather the way they say and just GO FLY THEM.
ENJOY !!! RED