Fig 5. Bracket mounting area, prior to installation. Double stick tape sometimes makes an excellent, stable way to mate up parts w/o much stress transmission - and if you don't use too much area, it keeps things decently reversible! The shoulders on the underside of the bracket will contact those tape pads. Weight forces will press down through the relatively strong yoke assembly side frames. Once positioned, weight, balance, cushioning and stickiness will keep the bracket assembly quietly in place. The tie down heavy duty threads will be mostly just as safety - to keep me from accidentally knocking the assembly off.

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