Quite a long shot but here goes. I have a disco 1 and have lifted it 4" and only have 3degree caster correcting radius arms but need 6degree so wondered if anybody needs the 3's but has some 6's
bought my QT 6's from m&m but afraid i need em with a 6" lift, have u thought of fitting castor corrected bushes to your 3's, may be a cheaper option if u cant get any