I follow what you're saying, but I guess I'm just not totally on board with a plate/tab setup. That was my idea and plan with the cardboard template originally, but I had changed my mind.
My aluminum jig could bolt right onto the frame and do what you're saying, but I just liked the idea of a bracket moreso. Its solid as a rock this way, I have my doubts even a 1/4 in plate would be more sturdy especially with vibrations and side load over time, but never know. I have to keep remembering I'm not riding this thing off road and certain components will not get near the beating I am use to. I really like how the bracket looks. I had figured in my head while I was building it, to go behind the busa rear set, but I like the look and design so much after finishing I want to figure out how to get it on the outside, basically.
(Already had this in SmugMug)
(Old piece of plate I had cut for the mount when I was thinking plate, too)