Hi Gavin,
I wasn't replying to you specifically but just commenting on the subject of SPAX and warning anyone buying then to check out their purchase ASAP on arrival. (quality control statement)
In the end (for me) I gained nothing over the original Lotus spec'd Armstrongs (I thought I might gain something with the adjustment and could play for the optimum settings,
but I'm quite happy with the stock non-adjustable Armstrongs.) I'm sure there are many people doing just fine with SPAX if they get good ones, I'm just not impressed with their quality control and in the end I spent a lot and gained nothing. As for the Armstrong replacements that I have handy in boxes to check (black with a blue Armstrong label vs the OEM blue ones that came on the car), The compression (jounce) is definitely easier to do by hand vs the extension (which is very stiff) but my SPAX had NO compression resistance and the adjustment screw only seemed to affect the extension(rebound) rate and did nothing on compression. I don't have a shock dyno to give definitive numbers, but there is definitely some compression resistance to help the springs when hitting a bump.. My SPAX instantly bottomed out on potholes. I was told these newer black Armstrongs were actually made by Monroe, but have no proof. The stamped number into the metal does reflect a lotus part (A079C2012F). I got 'em handy on the shelf for when the blue ones eventually leak.