The Vertigo II now has a proper power plant. Today I received my package from Graves R/C. The engine is a Super Tiger X-61 rear exhaust. I love Super Tiger engines. The previously planned powerplant was an O.S. 55AX, which is an amazingly powerful engine in it's own right, but the ST will out pull it hands down. I am glad, the .55 gives it's test bed aircraft such ballistic performance, that I am happy to leave it in that one. The pipe is a Macs 10cc quiet pipe. Now to get the missing link- the header. I will deal directly with Macs for that one. It looks as though their 1.5" "Fuselage Top" header will give me plenty of engine mounting options. It looks like an inverted installation with that header would allow the pipe to be about half buried in the Vertigo's deep belly pan. That would yield a clean installation. I think I'll kick that one around...