Hi Stephanie-
There may be a piece of an old broken bolt that is protruding enough to block the track from sliding freely. My track had been repaired in the past by putting in a new bolt adjacent to a broken bolt in 2 or 3 spots. I drilled the stubs of those bolts down a bit to ensure clearance.?
Joe
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Joe Cleary
Kestrel? -??S36 #54? -??Boston
