Bump steer

[J.Kirkman]

Hi, I have been running with the standard 10 degree castor blocks with the 25 degree kick-up shim and have been finding the car hooks terible mid corner. So I tried to get some 5 degree castor blocks but everywhere was out of stock. So I fitted some 3 degree blocks but now have massive amounts of toe out when the front suspension is compressed. I removed the washer under the ball stud on the steering block which improved this but I still have loads of bump steer and no way of getting the ballstud any lower. Is this a fault with the 3 degree blocks, can they only be used with the 20 degree shim? (I havn't tried this yet but dont want only 23 degrees of castor anyway!)

Any help or experience much appreciated.