I tried to run this morning, but the treadmill needed dismantling. Why didn't I go outside? There's an issue with the incline, but I can disconnect the motor that raises the deck, and run on the belt just fine. Perhaps the 2x4 method of incline is in my future.
p.m. So I took it all apart, and fixed the thingy, but a plastic sleeve that forces the lifting mechanism onto the splined pulley is broken. I should be able to laser cut a steel one and form it up, or machine one from some acetal; enough of the bits and pieces remained. What I still don't know is why the lift mechanism malfunctioned in the first place. The main motor still works fine, so I did 8 miles with no incline. 1 warmup, then 7:03, 6:53, 6:43 and 6:33 with .5 miles in between and a one mile cooldown. The faster miles felt fine, even controlled, but I still enjoyed the .5 miles of slower running. The crocs work well on the treadmill. They keep me running light, whereas the sauconys have me bang-slamming away on the deck. This is a cheapo treadmill that's loud and squeaky, so I can really hear a difference in running light and heavy.