Wow, shame about this mat/spindle situation. One good thing about my Thorens is that the spindle is on the thick side - sometimes I've had to use a pencil to widen the record hole so it would fit onto it without undue pressure. That means some warped records stay on. I might not be so lucky with the Rega.
Also, I have a thin anti-stat mat that I used to use. Maybe that would help.
Also, I have a thin anti-stat mat that I used to use. Maybe that would help.