Quoted from Barakawins1:I'll check this again today. It think they open just so slightly. As for the spring tension, I tried to unlatch the spring 1 turn and the flippers didn't come back to
their seated position. So I know the spring is fine. I'll check on the end of stroke operation again.
also did you look at the end of the plungers, often i need to file the ends to flaten them.
and you can move the return spring mounting by 120 degrees, the next screw, you need not do a full turn.
as to the gate buzz, a piece of electrial tape between coil and plate helps. ive also done this on plunger ends as well but that is a real temporary hack