In the off topic area I mentioned turning a Trencher Cuttingboard, so here is the board. It is turned off center out of about 2" thick stock with the chuck holding the board on a recess drilled in with 2 1/8 Forstner bit. the Angle is calculated and the chuck is tightened(really tightened). The lathe a CT128 with about 400 lbs of cement bags on the shelf as balast and turned at no faster than about 550. then once the cutting surface is finished to smooth flat satisfaction the piece is taken off the chuck and the face of the board is placed against a large faceplate with rubber shelving cover on the face, the back is jambed with a live center with custom wooden tip to the recess and pressed tight. The recess and back is now finished so that the recess is turned out and finishing embellishment is added, now the whole board is finished with mineral oil/bees wax combination. Hope I explained it pretty well.