Spoke to Pedders today... They were as helpful as they could be, but no real resolution.
They did say that the measurement on their website was a typo, and shouldn't read 710mm for the front and it should be more like 690mm. (Which is a bit closer to what I had and kinda makes sense that the car should sit evenly all round)
They suggested that the coils could be the wrong way round, and that I should check them. (The drivers side front should stand 7mm taller out of the box)
I new that I had them the right way round, but thought I'd check and rule it out completely. :nenau
Since I had them off I thought I'd test out a theory... The shoulder of the shock absorber sits quite far down the thread in comparison to the standard suspension... I figured if I extend that with 8x 3mm M12 SS washers then I would gain an extra 24mm of lift because it wouldn't compress the coil down as much. :naughty
With the strut top back on, it was time to test out my theory...
It didn't work as well as I had planned! :doh
I suppose the coil will still compress under the weight of the car to a given point. So this 24mm spacer actually netted me just under 10mm.
So at the moment, those big wheels are still rubbing a little.
Actuall strut spacers will be the only way to go as it has no relevance to the coil or the shock absorber.