After installing the alu anti-rollbar arms onto my new 710 and finding that the arms were binding just the same as on my original 710, I decided to take more drastic action this time.
With my original 710, I followed Crashed's advice and lossened the hinge pin grub screws on the front lower arms - worked perfectly, but then the hinge pins move around during a run, so the solution wasn't optimal.
This time, I took the bull by-the-horns and drill out the hole for the hinge pins in the alu anti-rollbar arms. The hole is already 3mm, but I think the tolerance is a little bit tight. After letting a 3mm drill bit slide through the hole a couple of time, I remounted the arms and found that there is no binding anymore
There is also no additional play on the arms, so it seems to be a safe and effective fix.
Cheers, Mark.