So they never wore out, but still came with 10 O-rings?
It sounds like a good idea, but the fact that they're not on the market anymore probably means that they were not all that great. Or did you see a noticeable improvement?
BTW: I just came up with an easy way to custom fit a barrel bushing. I had a gun with a loose bushing, so I dug through my treasure chest and found one that was very nice and tight in the slide, but too tight for the barrel.
I have made an attachment so I can mount a Dremel on the compound rest on the lathe, so I put the bushing in the chuck, a grinding bit in the Dremel, and ground the bore in the bushing until it fit snugly. I just worked the carriage back and forth until the bore was smooth, tried the barrel, moved the compound rest 1/1000", worked it again and so on until it had the right fit. It only took minutes to do, and the barrel is now nice and snug in the bushing.
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