Okay, so here goes. My son is a C 6/7 quadriplegic who has his sport pilot license. We just completed an RV 12 and I am starting to develop hand controls so that he can fly the airplane by himself. In doing that I need to add handbrake's. My question is, can a third set of master cylinders be hooked in to the current system or am I going to have to relocate the left seat brakes. I would really like to add a set of master's cylinders so that when I fly from the left seat I don't have to learn how to use the handbrake's. It's the old dog new trick thing. Thanks in advance.