Don't over look dollar store liner. I've been forced into partial left handedness thanks to a pit bull who chewed up my right hand. I've got it all over the kitchen to hold something in place while I clumsily whatever with my left hand. Same thing in my sewing room. In many cases I have cut 1/2 inch squares and used elmer's contact cement to attach them on a temporary basis - even to the working fingers on the right. Amazingly I have re-learned to use my rotary cutter accurately using only my thumb, ring finger and pinky. Just keep plugging and trying different ideas and you'll find that you adapt to a new way of doing things. It's slow progress (I'm 11 months in now) but apparently even a mid-seventies brain can be retrained.