Already have a Madcow DX3 2.6" and a 40+" Hi Flier 2.1" clone I built , so I'm thinking of building a mpr scale rocket ...Amram (spelled wrong ?) or something like that...Nike, etc...I like the 2.6" body size, but will go to 2.1" or 3". Have to stay in the e,f,g range of motor reload because where I fly , it's about all it will handle. Maybe 1500' height, maybe alittle more. I use a JLCR to keep it close..?anyway, what say the forum? I now have 2 29mm/40-120 engines assy so I'd kinda like to stick with that. But I am definitely open to adapting down from 38mm or whatever to the 29mm. Thanks for any experience with a certain model or advice...rsbhunter