Last spring I ended up using the cad model from the B&B Manufacturing web page, which is also where we bought more from:
http://catalog.bbman.com/db/service?...=2 0-5M15M6A8 which I found based on a search for the part number given in the KOP documentation or what was on the package we received the pulley in, can't remember which anymore.
I've also switched over to using the models from the SDP/SI website for the stuff I'm playing with this fall, since they have a very good library. I have not found any difference between the models I got from the two sites. The SDP website requires you to drill down to what you want in their parametric selector, there is no way to search using a competitors part number. Also, the prices at SDP are a little higher, at least for the 20 groove pulley, than at B&B. I also noticed that size is out of stock at both websites tonight.
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