I don't want to get caught between any of you on this, but please remember that Steven Dodd Hughes is a nationally famous man in his field, that of making extremely fine custom rifles and shotguns. He is also an author on such matters, and a talented photographer. It is an honor to have him on this board.
He has also posted enough about his vintage S&W's that I feel sure that he knows what to do to repair one.
As a distinguished gunsmith, he probably reacted instinctively to the suggestion that anyone needing to ask about re-timing the cylinder was ill-advised to be told to do it himself. It's akin to a brain surgeon seeing someone being told on the Net how to do home surgery.
I'm sure that Hondo44 and others here can do that job competently. The OP seems more cautious, and surely Steve noted that. I don't think he meant a personal attack on Hondo so much as he was aghast at what might happen if someone untrained did that delicate job and made an error.
I hope we can all see the matter in perspective. I wouldn't
try that task, and I do know what's involved, at least in theory.
Either way, I certainly wish the OP good fortune in correcting the problem. If I understand his post, he may also have a cylinder endshake problem. (Not sure about the looseness he describes.) I know how a trained armorer solves that, but have neither the equipment or background to do it myself. (I used to think a "mandrel" was the last name of some country singer.

)
Hope that we can all cool off and refer the OP to a competent gunsmith who won't take forever and charge him an arm and a leg.
But remember, Steve Hughes is not just an average guy who fiddles some with guns in his garage, and his reaction is perhaps more understandable. I do sort of see why Hondo reacted as he did, given that HE has the skills to do this task. Just not everyone else can. I think that Steve was just horrified that a fine old gun might be ruined by receiving less than proper attention.
Now, I'm getting out of the way, in case anyone starts throwing things...but I hope we're too mature for that.