The bad news is I made a couple stupid errors on the design, and I ended up scrapping my sled-focuser idea. Instead, I found where the focus was, and fixed the body of the sled to that position. And I had to add to the hole in the tube - check out the photo below, the one showing just the white tube with the hole in it. It's possible to sit down and hand-hold the scope and pan around, great fun.
Stars are reasonably sharp, and panning around the Milky Way is fun.
Wouldn't change a thing here. BTW, if you haven't tried Edmund's flocking paper yet, do it. I had trouble getting the rails aligned on the sled focuser, which is why I scrapped it. Or, maybe just a stationary single-hole focuser. Or, a one rail sled.