Probably the best for getting right down is the Rubi one designed for tiling. Carries a price tag though. http://protilertools.co.uk/knee-pads-for-tiling/1468/rubi-ergonomic-seat-sr1-81999
Thanks for that Sandy i dont think thats the one but i wished i had one when i used to tile stores & large areas
Just ordered 3 sets of those Knee blades things from the states, Kneeblades wouldn't reply to me directly , had to get them from Lowes via a friend of mine in the states, he is shipping them to me, about $60 dollars a set, so i am sure we will be having races soon.