After months of frustration with my tablet wobbling on the P3 I decided to look on Amazon for the metal replacement bracket that was supposed to cure all. After I took off my stock bracket and looked it over I realized the plastic one seems rigid enough and the real problem was too much play in the front mount. I dug around in my spare washer can and found one that would fit the front hole and voila, I have a dozen flights with a firm mount on my RC for a penny. The washer I used was approximately 7/16" with a 9/32" center hole.
1) Remove mount
2) Set washer in the front hole
3) Start the threads on the front mount
4) Reinstall the rear screw and tighten
5) Finger tighten the front knurled knob
1) Remove mount
2) Set washer in the front hole
3) Start the threads on the front mount
4) Reinstall the rear screw and tighten
5) Finger tighten the front knurled knob