I am bashing up a 1/5 +/- semi-scale Curtiss F6C-4 and ordered a fiberglass ring cowl (Fiberglass Specialties). I've never attached a ring cowl before. This has no obvious attachment to the fuselage from the images I have, and I'm not familiar with how original ring cowls were attached. At this point I figure on adding four dummy pistons (the "real" plane had a 9-cylinder radial) with attachment points on the tips and bolt them into attachment blocks glassed into the cowl lining.

Anyone have tried and true or better ideas? I assume there was some kind of framework on the full scale to position the ring.