Making a bit of progress now. I replaced the NGH 38GF engine with an NGH 35GX two stroke engine. I also reinforced the motor mount with 1/2" plywood on the bottom and 1/8" x 1/2" x 4" long alum strips on top. I am now waiting for the Dave Platt spinner to arrive so I can begin engine break-in. I also ordered a couple of Xoar 18x8 props for the new 35 CC engine.
Best wishes and good safe flying.
Heli-NuBee (AKA Roger the radial rabbit)