i hope you remove those g-clamps when you fly... maybe the cowl will improve the looks to.. man thats one ugly Capiche

my West also went flirst flick, flew it on the second run.
the West 36 i got today took a little more persuation but on the Leo 37 muffler and the 11x4 Master its already sounding as strong, still not leaned, only the first run, had 12,900 rpm

Cartman... your choice West 36 GREAT! engine, but expensive and no pipe comes with it.
Leo 37, very good engine, cheap and with everything it needs.
untill i fly the Cougar and get the West fully up to speed i can't say i would buy one over the Leo for a funfly, for the bigger Capiche.... tough, 2 Leos for one West...
i know your going light which would make the diffrence, but you can't have too much power.