Knife Edge Focuser For Sale

[Radar]

Knife Edge focuser for sale. Calibarated for a Nikon FM2.

Very good condition.

Bought it from Hutech a year ago.

http://sciencecenter.net/hutech/mitsub/focuser.htm

Reason I'm selling it is because I use an OM1 now, and my Nikon does all my widefield work.

Open to any reasonable offer.

[Red Giant]

Sorry for asking a silly question, but does it matter what kind of scope you use with a knige edge focuser?