New guy with M300 mini motorhome.
Handy little machine tip that gets the Allen mount bolts and their washers below grade so the carb butterflies will swing open, unobstructed.
Clamped the adapter down to my drill press base, then did the machining with a flat 3/4" wood bit to cut the recess.
Simple enough, for those of us who don't have an end milling machine. Aluminum is easy to work.
☆☆☆☆☆