Quoted from gordonshumway:
Lloyd: Great video for the flippers on JJP. I've got a Stern POTC and just did a flipper re-build. The bat is attached via an allen wrench 5/32". I tighteneed to what I thought was a good torque only to have the bat continue to twist. I'm afraid to torque it much more? Is there a Lock-tite type product that would seize it up and still allow disassembly later? Or do I just ball bust it tight?
I use a small 6" ratchet/socket wrench and a 3/8" socket to tighten the pawls.
You can tighten them a lot until the pawls close completely (you can see the gap).
Too much tightening can break off the bolt, so dont go too far past where the pawl gap closes completely.
That said, you can tighten them a lot to get the bats firmed up.
They will tighten effectively without any loctite.
Make sure the bats have some in and out movement and are NOT dragging on the flipper bushing or dragging on the playfield.
3/64" of gap is perfect, or a thin credit cards width.