For small parts I use a 1" thick piece of MDO with t-tracks. The MDO is cut to 48"x48". Fits over two of the zones in my table. The vacuum holds the MDO, clamps hold the material. Works really well and I kept my 5x8 PRS to 7 zones. 5 of the zones are used to hold a full sheet of plywood. The other two zones are for 5x5 BB and large slabs and blanks that I surface from time to time.