So most the community uses drop tables. This is where the workpiece can be adjusted up or down but the riding frame stays the same. This works but if you want to do super deep cuts you’ll need a special bit like what is posted here Cutting styrofoam, a work in progress
Now also talking about that same post he modified the files to make his LR3 have much more clearance. This does take some CAD and programming (firmware) skills to accomplish.
I also like what @c00nphrog said about stacking or vertical tiling (not sure the technical name) where you take multiple smaller pieces, stack and glue them together to get your archived piece. You can also see this method in that thread as well.