Hi Steve, thanks for the kind words...I had no problem with the Jigsaw ones but was mortified to find I had no idea how to locate the rack with them as I was building the subframe up off the car, as it was minus the hubs at that point.
Additionally, when I went to remove them as when the car was assembled the rack was
in the wrong place, I couldn't get them off even jacking the engine up so I had to cut them off. This is when I came up with the idea of locating the rack accurately using a block.
I did originally only have one block on the steering coupling side, and an original std clamp on the o/s with a poly bush, but when someone turned the steering with me under the car, I was appalled at how much the rack was 'pivoting' or wagging as you say Steve, from the secured side onwards. Ok not much, but I know how much that movement could be translated into as a result of the forces coming from the car moving...hence the second block!
I think I can remember Jamie saying something about vibration through the steering now, but in my road Sprint I had two blocks with a subframe located on new, but std bushes and whilst I had wonderfully direct and precise steering, I can't remember any adverse feedback from the steering: in fact, since then, I've tried to get every car I've ever owned to turn in as well as that old Sprint and that includes my M3 and current AMG.
Thank you for your kind words too Alun!
I'm pleased to see you're still in touch with Jamie....what's he up to nowadays?
I hold him and Neil in high asteem as when I was an Apprentice I used to spend most of my wages on goodies from their emporium and appreciated their enthusiasm and advice no matter how silly the question!
Btw, I guess if you do isolate the rack with these clamps, they will highlight a dodgy track rod or ball joint, or tired recon rack as Alun rightly points out, so beware!
And, if using two blocks, make sure you remove the little plastic bung that may or not be located on the o/s, back side of the rack that is supposedly used to keep the rack centrally in the tube...most are missing as it was in my refurbished rack from Jigsaw so it matters not, until you do happen to have one and upon fitting the second block find you can hardly turn the steering wheel!
I speak from experience!
**Edit** Found a picture to illustrate!.....get rid of the bung.....