I am waiting anxiously for my new (and first) cabinet saw (Jet XACTA). Rather than work as I should, I stare off into space trying to imagine the moment it arrives. I smile... then frown trying to figure out how to haul a 500lb gorilla down a grassy slope into a basement (at least I don't have to navigate stairs). But I digress - in reading the online manuals I noticed that I will have to level the saw. The directions say "check for level and adjust using shims if necessary". Does that mean I'll need shims under the saw? How the heck will I do that? And what would I use as a shim that wouldn't be crushed into nothingness? Or is it a simpler process, leveling the top only?