Ran the car with the spool in again tonight, really starting to get the hang of it.
In the end I lef the roll centres as-is, and adjusted the droop and toe blocks. Settled on droop exactly like Reinhards setup (5mm front, 4mm rear) worked very well at getting rid of some of the one power understeet I had been experiencing.
With the toe blocks, I went C/A on the front, having previously run D/D. made the car have awesome steering, and I was reallt able to carry the corner speed through the turns, a massive help considering I was running 27t stock. Very happy with the car at the moment, my confidence grows evertime I drive it, and my driving is getting better (helped by permantly running stock atm). Also I'm becoming more confident in making adjustments to it, and in knowing what improves it.
Now all i need is thoose bloody springs....
Ed