Quoted from TheLaw:
Some people take the pins out, some people leave them in...doesn't really matter.
I take mine out; I was cutting my fingers up when waxing the play field. But it leaves the problem of how to adjust the flippers and keep them even while your are adjusting, so I made a little clamping and alignment tool so that I can adjust them at any angle that I want. And I am able to adjust them for the same angle on both sides.
This is Catacomb after I had just got done adjusting the flippers, only to lower the play field and see that were not even on both sides. Drat.
So made up a couple of clamps so I can adjust the flippers where I want and keep them lined up as I get them locked down.
I used some polycarbonate plastic and some wood strips along with a couple of clamps from Harbor Freight. I can adjust them to where they are even and clamp them in place.
And then when I lift the play field to tighten up the pivot levers, the flippers stay put. After I get them tightened up, I remove the clamps and remove my adjusters and the flippers are lined up exactly where I wanted them to be.
There is also this 3D printed flipper angle adjuster that looks like it could also comer in handy.
Screen Shot 2020-09-27 at 10.05.40 PM (resized).png