I have had a munsters le for nigh on 4 yaars.Just recently woke grandad up .Remember the knacked crimps that col changed.Anyway the bottom playfield rt side flipper has often stuck midstream so looking at tnt amusements video about the same problem it was an easy fix so I removed the lower playfield and set about the fix but the allen headed bolt that secures the fipper to the crank will not move despite leavering the allen key with amole grip.Excessive force but no give ANY one know why the bolt is stuck fast .T he crnk assembly is 28 dollars and the bolt a few dollars more. so with mailing 80 dollars COS i cannot shift the poxy bolt Any one tell me why the bolt is stuck?Cheers william