I just received my PF yesterday, and have it working, but am having a few problems maintaining belt tension. Far as I can tell, you put on the bell, attach it to the belt, pull the belt and adjust the base ring until you have the right tension. Trouble is, at least in my case, I have to keep adjusting the belt. I can get it so it's, say, just slightly in the red. But walk around for a couple of minutes and look and I can see I'm down in the yellow or even the green. So, readjust the belt, but a short time later, same thing happens. Anybody know how to set it so that you don't need to keep readjusting?