Reply To: Polymetric OMF for sale. › Forums › Faceting Machines › Polymetric OMF for sale. › Reply To: Polymetric OMF for sale. March 2, 2020 at 11:20 pm #6229 Gregory HaysParticipant @gregoryhays To use a Facetron Mast you need the optional mast plate. Zane makes these and the base plate should already have the pre-drilled holes for mounting. In the pic it appears as though it has the plate for Facetron masts.