It sounds to me like you still have some brake bleeding work to do, as these assist units actually require the force of the MC to shove them back into their released position (like a manual brake would shove back to rest). Too small of an MC bore size, like the Baer supplied 15/16" MC, also do not quickly and cleanly shove the assist unit back to neutral either (per the smallish MC bore size). The location of the T fitting isn't very critical, though the orientation of the T fitting is very critical - click here for more on this:
http://www.hydratechbraking.com/foru...topic.php?t=38
Know that you also have our full support available to you as you did purchase this system from us = please feel free to call me if you have any further possible questions, as we really are here for you.
As far as your distribution block issues? It sounds like a pressure imbalance between the front and rear had actually attempted to lock out the rear brakes (which is what later model combination valves are designed to do). If your front brakes where blead out well, though you had enough air still trapped in the rear, the combination valve most likely "thought" that you had a failed brake line (per no real pressure building up in the rear circuit as a result of the air) and attempted to lock out the "offending" circuit. Some have a push button that can be depressed to reset the shuttle valve internally, others require hydraulic force to shuttle the valve back to neutral. What you could've done was to trick the valve into opening back up by pumping up some pressure in the rear circuit, then hold the pressure firmly on the pedal, then open up a front bleeder. The valve would've shifted in the opposite direction per the pressure loss in the front circuit, effectively then locking out the front brakes as the "offending circuit"...