Originally Posted by CooperMan
Bunny, I've got some nice 3-4mm thick slightly compressible black closed cell foam that would be perfect for that

If you're going to Curborough in June for the MTWC event let me know & I'll bring you some
Thanks for the offer but I don't think I'll make the club sprint this year because I'm double-booked. I did try to poke a suitable thickness of rubber mat into the gap but failed due to its flexibility. Hopefully my craftsman-formed piece of MDF will last the course!