The XACTA doesn't have leveling feet??? I'll be darned, the manual doesn't show any. That is awfully optimistic of the manufacturer. With a broad enough surface you can support quite a bit of weight on wood shims, plastic shims, etc.
My workbench is about 300lbs and has a regular ole door shim under a rear foot. I thought I would replace it pretty much right away but it's still there and still in one piece(?).
Don't stress. Close your eyes. Think of your saw. Ahhhh, there you go.