Hi Sambo, I have QA1's (proma stars) on mine. They bounce up and down and dont rust - and thats about all I can tell about their performance at this stage. Im pretty sure Bernie has these on his too. Careful with the lengths as From memory they go from 10-14" (open\ closed) to 11.5-17", which may not be compatable with your specified lengths. I got mine from a mob in the US - I think about $800 delivered, but with the dollar should be better then that now.
Cheers.
