Posting here in case it helps anyone else. I was experiencing a lot of sled lift on the left side of my workspace, even when the machine was jogging. Tested a couple of things but it turns out I had an issue with frame twist. I used a free angle finder app on my phone and dialed both sides to 20° and it went away.
My frame hinges on the wall and uses some cinder block wedges, well I guess the floor is tapered and the left one needs an additional shim. I shimmed it mid-cut and still had issues, so I think it stemmed from being off when setting the initial tension. The next time I ran it I had almost zero sled lift in that area.
Just an anecdote, but if anyone else is seeing sled lift you might want to check your frame.