SpiritedDiscussions said:

is there a way of factoring in tables with rounded pockets?

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… not easily since the whole system is based on flat-facing pool tables.

SpiritedDiscussions said:

also this is amazing, thanks for collecting/sharing!

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Thank you, and you’re welcome.

So I went out to the shop and quick made a spacer. Was really simple as I just used a piece of 3/4" inside plumbing pipe and turned the outside to fit. Pictures show the Jacoby QR extension bumper insert and it fitting on a Schon. I don't recommend using it this way as it only screws in apx 2 turns. A taller bumper would allow you to shorten the spacer to get another thread or two hold down, but even then it's iffy.
The way to go is one similar to that top one in that Prather picture or a similar one I showed in my earlier posts.
They may work without modification, may not though as the distance the bumper sticks out has to be correct. If they fit long, it would be very simple to correct that for the extension used.

Michael Webb said:

If your talking about the picture in post 1
Yes sir, it's a 5/16x14 Acme

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Good info Michael. I thought Acme pins were generally 3/8 X 10, and this one pictured didn't seem to have the flat exteriors on the threads to me. However, I guess they came in 14 thread as well.

I watched it live on WST this morning at 0100am. Great day to wake up early.