I've just installed the mezelmods bracket and modded the wolverine paperweight to fit in the game.
here is what i've found and my suggestions (typing this up very quiclky with limited time):
1) the posts that come in the mezelmod kit are too short and thin for the playfield and will not be able to be nutted correctly from the bottom. I swapped these out for #8 rubber posts and hammered these in from the top side (rock solid). I also had to drill out the base plate so that it could fit over the larger post thickness.
2) you can use titan rubber posts on the front 2 posts and the thinner black supplied posts on the back 2 posts and everything works fine.
3) If i take the bracket out again i will change how the switch is mounted. there is not enough length in the screws to mount it properly. i will switch the screws out for longer #6 machine screws and a threaded backing plate so that the switch can be removed without having to drop the pop bumper bracket.
4) i switched the leaves of the switch around so that the outside (towards the pop bumper) switch gets pressure from the inner tensioning leaf. the way the switch is shipped is more for a NC (normally closed) switch.
5) i took the wolverine bust and sawed him off where he meets the base. i then drilled a hole up through the middle of the figure and hogged the bottom out a bit to fit over a #6 nut. i then drilled a hole in the center of the 3d printed top piece that fits over the captive ball, pushed a #6 2" threaded screw through the hole and secured it with a locktited #6 nut. The wolverine figure was tapped and then threaded onto the rod.
I worry about the longevity of the bust as it's made from a non-flexible chaulky plaster like material. if it gets a good ball hit it will break. i will make a plastic piece to go on top of the base to help prevent balls popping up from the captive ball.
The sensitivity of the captive ball is awesome on mine and i can get wolverine hits from the upper flipper (difficult, but possible) and off center shots no problem.
I didnt have a ton of time for game play last night but in quick practice it feels awesome and the xavier shot is a nice solid shot instead of the frustrating mess it was before. hopefully will have more time for play tonight.
-c