Massive thank you to kebab19 for your original post and tommyardin for all your help. I finished putting it all together yesterday with new oil seals, dust seals, modded damper rods, 15w oil, linear springs and the cartridge emulators and took it for a 40-50 mile spin today and what a difference! I don't feel like I'm bobbing up and down all the time or nose diving under braking, feels responsive and stable but still has nice damping for bumps and pot holes. I does seem to have highlighted the poor rear shock though as the front feels solid but the back wants to bounce me off although that might be as I've got the preload set to 6 not the standard 4 as I've often got a pillion.
Next ride I'll drop the preload on the shock to 4 and possibly the preload on the forks just a touch and see if it's more balanced.
Great mod and I'd highly recommend this to anyone confident enough to give it a go.