Appreciate the ideas/info folks are sharing here.
If you’re thinking of something like…
Consider mount along the lines of…
Pic shows 20lbs precariously placed on an existing YZ plate, reusing 2 of the existing M5x30mm to attach the YZ bolt-ons (1/4" + 1/2" ply).
Am watching this topic as well to see if my janky YZ bolt-ons created to stop popping wheelies can double up to mount fixed height vac plate too.