I've tried the heavier 11x7 APC and it helped lower the idle to 2200 but still it's fluctuating from 3000 down to 2200 over a minute or so - what gives??

My local hobby shop isn't open till Monday for the MAS 11x7.5 or the 12x6 swap yet.

I don't think that's gonna change the fluctuating idle though.

The coarse in line mesh filter over the venturi sure solves the "spray" problem.

root