Paul from SWISCO responded:
October 26, 2017
Thanks for posting, Brad. If the diameter of the tube is 3/8", then I'd go with the S900-29 spiral balance. As for the shoe, it's hard to tell. Start by looking at our 15-173, but carefully go over our measurements just to confirm they match. Just eyeballing it, it looks similar to our 15-045, but this is only 3/8" thick to your 1/2".
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