A little misleading I suppose, but all they actually do is give you camber adjustment, the ability to do castor is as a result of the rose joint running at a more acute angle than standard (if you get drift) a normal bush would be under intense twist with a severe castor angle......The way to achieve the desired castor would be as I said earlier, either washer/shim the anti-roll bar to drag the TCA's forwad, compression or tension struts for an ultimate set-up. Down side is more noise transfer from the suspension but overall superior handling, does the car have an anti-dive and double width kit fitted? these are a cheap and useful upgrade for the capri set-up.....

Castor is useful....severe castor will dramatically improve the turn in, especially high speed, but as I said the down side can be a heavy feel...I know a guy who runs 7 degrees on a sunbeam and thats mighty heavy....

HTH

Ian