In retrospect I'm not sure why I went to all the trouble to implement a dual control system. I've almost always flown with my right hand on the throttle. That might have something to do with the decision, And, somewhere along the line I thought it might be fun to do some flight instruction in the Q.
In any case, I've implemented dual controls except for the toe brakes. I did install mounts for a second set of toe-brake cylinders, but I've not installed the cylinders.
The basic idea is to place the sticks in the side armrests, and run the torque tubes along the sides of the fuselage back to the FS95, the bulkhead just ahead of the fuselage split line. This keeps the space behind the seats open for luggage or maybe an aux. fuel tank.
To keep friction to a minimum, all control system bearings are Rulon mounted in phenolic bearing blocks.