Recently while playing my Mata Hari (ss) pin, I had an issue with "chattering" on the right flipper (some call it "machine gunning" or "stuttering"). Checked a few things and decided to buy a new coil. After replacing the coil, the chattering is corrected however the flipper is not as strong as before. I have cleaned all the components of the coil and reset the coil itself. Any ideas? Again, its functioning but not as strong.