I had a bt3000 for a while and I can definitely understand your issues.
Seemed like no matter what I did, I could not get the sliding miter table to give me truly square cuts. I did make a cross cut jig for it and that helped a lot.
Even with my G1023, I still use a crosscut jig for most of the square cuts I make. It's also really useful for cutting small pieces, as you can rig it up to have hold downs and such.
My just rides in the slots, and unless I'm trying to cut something really wide, falling off the front end of the saw is not a big deal.
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