I can confirm there are two different sets of plates (steels and Friction) in there

I dont know what sort of problem you are having Tim but I would take the plates out and inspect them, you might not need a full set or you might not need the steels. In my case I only needed two friction plates, all the rest were within spec. So I replaced them with originals for less than £20
I don't know if you have had a problem with clutch judder when pulling away hard from a stand still, but if you have, you might want to look into upgrading your SP1 clutch to a SP2 spec if you are doing a complete clutch overhaul any way.
Pete