Sorry, can't speak to the Jet metal working lathe. I have a 90 year old Atlas that's been a solid machine for the last 40 or so years. You'd probably do better looking for a metal working forum...
Never really understood why a miter slot is considered necessary on a router table. A good fence to butt up to is usually all you need, sometimes a carrier is necessary for narrow material.
The install is well on its way, so I can't go back and undo. The oak is kiln dried if that makes any difference. I don't know how much shrinkage I will get. The dealer said "none."
Another alternative might be vinyl deck covering.
Weatherproofing exposed shed floor...