I think I had HS 55 size servos with a de-cased 555 or 535. 150 MaH battery. Don't remember having trouble with scoops coming off. I used Z56 to glue them on. The carb scoop is the hatch to get in. Looks like one of the manifold is off... It's supposed to look beat up... It's a war bird.

This one is their big one, #403, the other #504 is only 16 inch span.
Easy Built stilll makes a big one at 50" #FF-55. Also a 17"(#FF-49) and 20"(#EB-01) I have a 44"(#ERC-5) and I think I have a 35" statched away somewhere.


Edit ..... remove a wrong picture