I was unhappy with the clearance against the front upright, even after maching it on the lathe, due to deflection of the shaft. I re-manufactured mine today with an additional group 4 coupling and escort splined shaft. All I need to do now is secure a rose joints to support the shaft. (Note: I used the XR4x4 steering shaft the the top coupling is larger than usual. This is a slightly more expensive option, but I think it will be worth it. (Larger photos availible on my Flicker build Diary) It may be possible to adjust the rack mounting slightly to gain an additional 1 mm.