I managed to get the gantry with height adjustment made this weekend.
Made two L shaped legs and put 5” wheels on them. I used 1/4” lag bolts to hold the wheels on.
To make the guides/clamps I made a box that the gantry can slide up and down on. I used 1/4” bolts to hold it all together with the front peice being loose. It is loose so it can be used as a clamp to hold the unit rigid during use. Just turn the handle and it gets super tight. It is held to the gantry with 4” long 1/4” lag bolts.
The height adjuster uses 1” threaded rod with 8 turns per inch. This makes it quick and easy to adjust. It is also easy to remove for teardown by removing the 4 lags bolts on the top of the gantry and the adjuster nut just slides out.
I also got the power hooked up to it and had it running. It runs nice and smooth. Just need to make blade guides and guards.