mpriestley:

The Duellist 2/40 is a very strong airframe, if you keep on sanding and hollowing it also will be light enough for a pair of OS 40 FP engines. My current 2/40 has K&B 8360s on it, goes nicely. For fast the Webra 50s like the one on your Magnum would work very well. For less money and still good performance, the Magnum XLS 46 engines. A little more money? The new Magnum 52s. Haven't used the 52s, but I've been well pleased with their 40s and 46s.

ChuckAuger has a pair of piped OS VRs on his. Rocketship.

So the engine choice is up to you, mild to wild. just stay in the 40-50 range, mainly for weight/balance considerations.

Had a Stinger 10, it put me off Lanier. Way too much plastic. Never built the HoB Decathlon, but all the HoB kits I've done have pleased me. First was an FW 190, which also got my first Norvel 0.061 as a replacement for the original Cox TD 05 RC I put in it.

HTH

Bill.