Call me nuts, but I picked up an Aviastar .46 from my LHS to fiddle around with because it was cheap and I like fiddling with new engines. They had a needle problem with um for a while, wrong one installed from what I understand, but those problems were reportedly resolved. I stuck it on a .40 trainer and loved that engine, ran like a clock, ran strong, tuned easy and never dead sticked. The airframe apparently liked it so much it decided it wanted some alone time with the engine and flew away. Oh by the way, buy a good Rx battery charger and always test the battery before flight....even if you just took it off of the charger 30 minutes ago. My fault, I know, on a side note... anyone want a free piece of **** Onyx charger?, makes a good door stop, not good for much else. Seems to charge stick packs for my sons RC truck just fine, but nothing else. Aviastar .46 is $49.99 at Sigmfg.com, just a low cost option. I bought a Magnum .46 when i replaced the airframe and hate it, the carb is a piece of crap, you shouldn't have to use plumbers tape on a brand new low speed needle because the natural action of the throttle turns the needle all the way in.