I do have a hole-cutting tool I may be able to rig up to reduce the top of this thing to the right size. It would leave me with about .050 wall - which isn't much, but probably plenty. Finding center will be the tough part. There is a threaded hole in the center of the adapter I could maybe use as the center to guide this cutter, but not sure how well they spotted that into the center of the opening. Will have to measure it. More fun.
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