Sorry, no answer to your question, but it is an interesting subject not often discussed. What adjustment is offered by the Spax shock absorbers? Is it just on rebound, or on compression as well? Did you replace fronts and rears at the same time? Did you source via RT (maybe they have good setting-advice to offer), or from a Spax distributor like Larkspeed? I considered fitting them but did not proceed (yet), I was advised they may be difficult to balance, especially if the clicks do not give 100% identical adjustment at left and right units. So it is in the pending file until I can learn more about the potential benefits. Usual setting procedure would be as you have almost certainly already done, i.e. start exactly in the middle, see how the car rides and corners, then adjust firmer or softer as one feels necessary, in very small amounts. Very firm is probably not such a good setting as although it may improve roll on cornering, it may be too harsh and stress some body components on rough surfaces. In any case, there are a lot of variables to consider with 4 units to adjust, especially if rebound and compression are both adjustable. The alternative seems to be the standard units as offered by Chris Prince, maybe they are Monroes. If the TC handles better than the TF, perhaps it has firmer rear springs, for example if they were replaced with slightly harder set / higher rate units at some time? If you do find a significant improvement with Spax compared to standard units it would be very interesting to hear about it (and to hear about your experience of changing the rear units, maybe a bulletin article in the offing?). Giles Lacey Posted by lacey giles 10/02/2015 16:31:18