I'm still working on my scratch built Astro Hog, and am using a Saito 90 four stroke. When I held the engine against the side view I realized that long motor with a regular motor mount would put the weight pretty far forward. I made sometee shaped mounts out of 3/8 aluminum plate material that allowed me to get the back of the carb almost touching the firewall. This puts the cylinder and prop in about the same place as a sixty two stroke would be.
I have the fuse pretty much done and am fitting the wing and horizontal stab / rudder from my old Hog to it. I'm starting to wonder if it would have been easier to just build new ones. Today I realized the fuse sits at a slight angle to the wing when viewed from the front. Just enough to notice if you look close, but enough to bug me. Tomorrow I'll add a 1/16 piece to the wing cutout on one side, and will also have to file around on the holes for the dowels. arrggg.
Fabric and paint would look nice - my first one was fiberglassed and painted cream and maroon. Astro Hogs are good looking planes - and paint doesn't come loose like plastic covering!
Jim S.