Awesome replies everyone!
I've got some bigger jets on order... i guess I'll hold off with the drill until they get here.
I wonder how those original carburetor designers kept their job without AFR gauges!?
Elevation here in Los Alamos is ~7000 ft... I haven't tried a vacuum gauge, but it does seem that there is enough to turn off the power piston at light cruise. But the way I drive, it's almost always on. I was also thinking about making the main jet bigger and soldering the power piston orifice so I can drill it a bit smaller since dropping by 4 ratios when piston engages seems a bit extreme.
This 'rottenchester' is a good challenge, I'd say worth a few more chances.
