The WM has a steel track that does not move. The two saw heads move independently up or down with a ratchet. When changing thickness, which we do not do that often, takes a couple of minutes to get it exact. We first adjust to where we think it should be according to the guage. We run a slab and check its thickness. We adjust and run again. It might take 2 or 3 adjustments, but we want it to within a few hundreths of the proper thickness because we will be running thousands of pieces.