I was seriously so close to fitting the top plate over mine too and had also done a trial fit like that!! It goes on the chaser88 frame with no problems - just needs some of the sub structure dremeled out so it drops down all the way - but then I decided why add the extra weight when I can just slap on a sick looking canopy and abandon the stock look completely.
I too had uncontrollable rattles no matter what I tried and blistering hot motors regardless of the tune. But with prop guards on it was manageable, barely within reasonable limits, and I was happy flying it as it was. Once they broke it was game over. I knew I needed to make the switch.
Thanks for sharing the pictures! !