15/16" bore is what I've been using and I still felt that it was too sensitive. I think I tried every pushrod length possible. If I ever go back to the booster I think I'll try a 1 1/32" bore as that may give a little more travel and less sensitivity? I'm hoping I like full manual. It will definitely be easier access to bulkhead connectors and such with the booster out of the way. As a side note, the FSM I have on CD lists 15/16" bore for manual disc/drum and 1 1/32" for power disc/drum which seems to be the opposite of what I've found anywhere else. Are all the parts stores wrong?