Spent another couple of hours trying to fit these brake assemblies into the tight confines between the seat, the floor, the rudder pedals, and the retract torque tube. Fitting the master cylinder and brake fluid reservoir is challenging enough, but there also needs to be room for brake travel and proper geometry to get sufficient brake force with reasonable and predictable brake feel. Getting closer. Fabricated some more pieces to trial fit things together and test. Not done yet, but getting closer. Got distracted and reviewed the retract torque tube assemblies again.