I have built a number of them myself. It is not a project that is all that difficult. The key is how it works for the dogs who spin it. Most carpet mills made today are not so much a carpet mill as they are a belt mill. The carpet mills of yesteryear used a bulkier carpet, sliding on sanded plywood with the carpet sliding over stationery PVC pipe as a roller. Over time builders free'ed them up with better carpets, sliding surfaces and end rollers. A lot of the 'carpet mills' (belt mills) of today allow a dog to open up and spin in favorable comparison to slat mills while still driving the mill with each step. I have made a few that would make 3 1/2 to 4 1/2 revolutions with a hard hand pull.


Then there is the look. I can remember building the frames with 45'ed and mitered corners. Everything was glued and shot together with screws in the main frame. Every hole filled and sanded. Stained and re-stained several times. At the end of the day it had high end furniture quality structure and appearance. In the corner was my personal mill that was glued and shot butt-end. No filling. No sanding. No staining. Just a mill. Both worked the same but one had to be sold for a lot more to cover my time and efforts which had nothing to do with the mill's effectiveness.

Good looking mill. EWO