I own an LM-470D which has the remote up/down with limit switches. The
exact limit switch is made by Square-D and can be found in the Grainger
catalog. Tri-ex gets over $300 for the switch, if I remember, Grainger had it
for around $125. The arm that mounts on the switch is sold separate. I
replaced both switches on my tower several years ago and I still have the
boxes here somewhere.. When I find them, I'll give you the exact model number.
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