One hitch is the existing mat is bonded to the platter- can't use it for a pattern. I plan on using the cork over the original in order to adjust the VTA since the old Dual was a changer in it's first life. I may try one of the 12 inch ones without trimming it- the overhang won't be more than 3/4 inch anyway. I will check the local Lowes for the drywall cutter and I'll look at the planter mats and cork sheets while I'm there.