Picked up Old Crow. nice plane, but worried it is fragile? I have to take it out of the box and check.
I have the Roto 85FSI
I looked at the Kolm inline 100cc twin, but I think it would be way to heavy for this plane.
Something like 12lbs or so.for the KOLM and 6LBS for the Roto 85cc.
I did some honing to the intake and exhaust ports on the heads and lightened the pistons.
Looked at the oil amounts when apart, and there is PLENTY of oil in there.