RE: How to adjust high and low speed needle valve on Evolution .46?
Assuming no crash damage, and the engine/tank position is correct.
Screw the idle control all the way in. Now you know it is in the wrong position. There is only one way to turn it to correct it. Start the engine and set it at just below max rpm. Adjust the idle screw a turn at a time to set the idle speed. When it looks as if it is getting close adjust with lesser amounts.
Ed S