I'm afraid that you may have run into a problem that I've heard about but not seen myself.
When I rebuilt my SIII Lightweight two of the drums were nearing their wear limits, and the other two weren't particularly round either. No big deal, buy some more. Now that's where it got interesting. Two of the suppliers I use (and trust) gave me the same story. Whoever it is/are that make new drums is making such a bad job of machining them that they won't stock them any longer - they were getting so many back. You'd think it wouldn't be a hard job, but these people just don't seem to understand how it should be done.
Long and short I skimmed my worn ones, yes they're fractionally over the limit, but they work beautifully.
Take yours to someone who's good with a big lathe and have him check them and correct if necessary.
When I rebuilt my SIII Lightweight two of the drums were nearing their wear limits, and the other two weren't particularly round either. No big deal, buy some more. Now that's where it got interesting. Two of the suppliers I use (and trust) gave me the same story. Whoever it is/are that make new drums is making such a bad job of machining them that they won't stock them any longer - they were getting so many back. You'd think it wouldn't be a hard job, but these people just don't seem to understand how it should be done.
Long and short I skimmed my worn ones, yes they're fractionally over the limit, but they work beautifully.
Take yours to someone who's good with a big lathe and have him check them and correct if necessary.
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