I used extra adhesion genuine Velcro. Works a treat.
I am so pleased that I changed over to bound carpet shaped from the originals.
I still have two spare sets if anyone fancies them, in charcoal / black deep pile, looks and feels very nice. If they get a soaking just take them out and dry off.
http://s1299.photobucket.com/user/DonaldReid/media/IMG_1965_zps31a0ea0f.jpg.html?sort=3&o=14Also pleased with the look of the build plate I bought from the Morgan Shop.