Re: "(Anyone know of a drop in replacement carb for an Evolution 1.00NX with the same "walking" problem?!)."< I have the same problem with my 60 size EVO engine. I can see the needle valves start to turn when I throttle up!! I have never been able to get more than 1 flight without the engine acting up. Thats why I have a TH 60 throttle barrel on order to try in the beast of an engine. If it won't behave with this, then I will haul out the new carb and chuck the engine. [>:]