Originally Posted by
scarlson
I mean, don't screw the bolt all the way snug.... it seems like it could work, if a little finicky.
You are correct and Moe has a point. If you are a mechanic sure but for home use I would save your money for a lovely set of Vessel screwdrivers for those JIS screws. I probably check a hanger a couple times a year at most and a machined shouldered bolt would be nice but a few seconds is all that you will be delayed without one. I have a large brass washer between my fabricated tool and the hanger and there is usually residual grease on the hanger so it rotates smoothly and I always check the bolt head with my fingers after every move to another spot on the rim. I find finger tight does not allow the arm to shift at all for accurate measurements.