Do a search on the other club site. There are a couple of threads on the Perrin endlinks.

Hard driving may cause the bar to walk. The fix is pictured above. (Perrin is not "marketing" this product, though it might be available from the vendor that sold the endlinks.) Or you can use two hose clamps. Make sure the bar is centered first. Do not force the endlinks into position, bearings may be dislodged from sleeve and not go back tightly. Loosen everything up and align the bar/endlinks that way.

Happy Motoring