Seeing how some kits supply an engine mount or recommend a system, what are the good and bad features of : single mounts, two-piece mounts, mounts with grommets, 2-stroke different from 4stroke? I am about to add an engine to my 4*60 and want to go to a reliable running engine and mounting system. I have built the kit stock as this is my first low-wing plane. Any help here is appreciated. Mikel-T