Right....carried out the floodgate mod....and I noticed my damper looks like the Mission Control DH damper.
Here's the normal damper with the floodgate removed.
http://img291.imageshack.us/img291/125/dsc00906wd7.jpg
Mine has three large oval ports instead, like the MC DH. Now I know that if you upgrade to the DH damper you also require the dual flow rebound assembly upgrade, as the standard rebound assembly doesnt push enough oil through or something and so you lose your compression adjustments and the fork becomes super plush and wallowy.
Well my new modded fork is super plush and now the compression adjustments contrary to what pinkbike said, seem to have a lot less range. So have I in effect now got the Mission Control DH damper as it's different to the one in the picture?

