This guy, Thanos's simulator uses the basic shell of the "Joyrider". Plans for the Joyrider have been available since the late 90's
www.acesim.com.
The Joyrider is ingenious in it's own right. It's unpowered and the seat pitches and banks with the movement of the control stick. The joystick grip is removed, wires lengthened and spliced and mounted on a piece of aluminum tubing.
The joystick base is mounted backward on the stationary frame under the seat and by use of elastic cord connected to the joystick "stub" it's the actual movement of the seat that controls the interface.
You don't really get alot of "g" effect but the motion cues on the inner ear give you a sensation of flight.
An enclosure blocking outside stimuli would greatly increase this effect. I've read of people getting some motion sickness.
It wasn't real practical in the 90's because of the weight of crt monitors but with the advent of lightweight flatscreens it would be more applicable today.
A company is producing a refined, commercial version made of aluminum
www.mydreamflyer.com .
Thanos's sim uses software to extract from the computer and electric servos (wiper motors) move the platform according to what the flight model of the game is doing. (engineering beyond most peoples capability.)
One big drawback is having to climb over the frame to get into the thing, another is the large size, not something you would fit in a corner of your computer room.
The Joyrider works because the seat (and weight) hangs from the pivots and when balanced is stable and somewhat self centering, it doesn't take much force to rock or swing.
If you could eliminate the gimbal frame and mount the pivot directly under the seat you might really have something, but it would be really top heavy and would tend to flop over. Even if you added counter weight under the seat you would have 350-450lbs to move around. Couldn't be unpowered and I don't think 12vt wiper motors would have the power.
But if you have the room, the original unpowered Joyrider could be made to work really well.