Thanks I have heard good things about them. Do you have it over a carpet or a solid floor?
Oh, they really are good, Bruce!
It works best on solid floor. I have it on a wood floor, it's a single layer.
The speed on mine can be varied between 10-11. I think you can order them to go as fast as 11-12 and down to 9-10.
Also, those guys are good to work with. They'll cut it most any way/size you want.