Wouldn’t it be better to have a 16” mat? The outer edge of the disc will be unsupported with the smaller mat. I don’t know if it would make a difference, just wondering… <L> Lou Judson Intuitive Audio 415-883-2689 On Jun 6, 2016, at 6:32 AM, Steven Smolian <[log in to unmask]> wrote: > I use a Technics SP-15. For 16" discs, I had the arm repositioned to give > me good arm clearance. Since my SME is mounted on the Technics tone arm > helical twisting base with considerable vertical movement, I had a glass > shop make a 16" 1/4" plexiglass disc and center it and drill out a hole for > the spindle to go through. Cost about $ 50.00. I take the rubber mat off > the turntable and place it on the upper side of the plexiglass disc. Works > fine.