Occasionally my 6-32 socket head engine mount bolts will break a head off of one. I'm running a Saito 82 on a profile plane. The prop is balanced well but the profile fuselage planes do tend to vibrate. I have been using black alloy steel bolts from RTL fasteners. My question is what type of 6-32 bolts would be stronger? Stainless steel? I don't see any other types at RTL. I don't really want to drill out the engine mounting lugs for #8 bolts, would rather use them on the larger Saito. Thanks!