Card Whiz left flipper moves from position

[femto]

Hey all
          My Card Whiz left flipper drops from its home position after a bit of use. I have swapped the flippers over but this is still happening. I thought if I got the grinder out and made a flat spot in the shaft where the lock bolts hit the shaft all would be good but then if I put the flat spot in the wrong spot what then? This problem cannot be unique to me. What have others done in this position?

[Retropin]

Whats your grub screw look like?.. if its all rounded then it will have little " bite"

[Strangeways]

Sounds like you need to replace the flipper shaft. When you say you swapped the flippers, did the problem follow the flipper ?

[femto]

When I swapped the flippers the problem remained on the left side. I might try and find some replacement grub screws and give that a go.

[Strangeways]

When I swapped the flippers the problem remained on the left side. I might try and find some replacement grub screws and give that a go.

So it is not the shaft.

Can you physically move the flipper shaft within the pawl ? Sounds like the grub screws are not holding.