I’ve owned a nice under steel tube cockpit from Playseat, I currently have a Next Level Racing F-GT Elite, and the TR160 MK4.
I use triples and VR. I’m currently in the top 20 California iRacing in fixed Mazda MX5.
The TR160 MK4, after design review, was ideal for a 4DOF SFX100 motion system. Having vertical uprights for the wheel deck is a real advantage over the F-GT Elite. The seat sliders are solid and the overall footprint is smaller while still being very rigid.
My only critique is the ButtKicker Gamer Pro is not easily mounted to the cockpit. I believe they have an adapter for under the seat but it isn’t specifically stated on the webpage under accessories if this use case would be ideal or not. The seat slider would rattle is what I suspect.
Instead, I mounted to the back of my Next Level Racing seat which fit the TR160 perfectly. I even used the NLR seat adapter and it worked as well.
I’m very impressed with the overall build quality although I did notice some damage to the cut end of a single upright on the wheel deck stand.
I would highly recommend this cockpit. Especially when considering a motion system. The option of a triple screen rig mount is also a nice option to have although I think I might end up purchasing the self standing model soon.