Hi Tom,
Are you using diaphram or 3-finger pressure plates or both types in the cars you build?
If using diaphram type, have you ran into any problems with these and/or setup problems on the hyd t/o side?
I ran a 3-finger pressure plate setup with no problems, and then tried a few diaphram pressure plates that did not work out as well for me; so I ended up changing back to the old school setup as a result. Should have just left my 3-finger in there to begin with and would have not experienced issues...