Hi, all...just a little update on the funtionality of the Walbo change. I've used the saw all week without a glitch. Startes, idles and runs AWSOME!! It had good power, excellant throttle responce everything that I look for. It will be hard to find a better carb combo for this saw. Still waiting on the micro bits so I can MOD the Zama. Terry said its a good Mod and excited to give it a whirl. I find the advice here on AS to be GREAT!! Terry, was wondering if when drilling out the jets and only having 1/4 to 1/2 turn of idel adjustment left, what would happen if one would drill a hole or grove the throttle plate to give it more air. I had to do this on an Echo 8000 for idle adjustment after porting the saw and adjusting. It had little or no idle adjustment left so I did alter the throttle plate to draw more air at idle...solved the issue I had. Now saw tunes and seems to have all stock type settings back to normal...just has a VERY nasty disposition toward wood now. Just thinking!!?? Also Terry, you say you can alter throttle responce with the springs? Been thinking about this and trying to digest it....stronger spring faster responce??? Thus the spacer washers and/or differant springs?? Any way just wanted to update and tell my findings thus far.