I need to mention that I went down to check the tensioner on my 301 and noticed that the shorter tensioners (the 301 and the FW for instance) don't have their tension posts flush with the knurled nut until they're about full tight, so roughly 9 - 10. Set like that you get full range of movement. If you set it so the nut and post are flush at 2, you get adjustment from 1 - 3 max.
Other than that, my machine is set per Jamie's video and my posts and videos.