Swivel Chair Lock

I have been looking for a solution to a small problem a small number of people may experience. I enjoy SimRacing, but have limited space, so no room for a solid rig. I make do with a Wheel Stand I can set to the side and an Office Chair.
Said office chair has Bell Casters to prevent it rolling around, but I still had a problem with swivel. So a Reddit search proved that I wasn't the only one with this problem, but among a few who had similar ideas.
1 year later, I finally figured out how to design and print a solution.

I recommend printing this teeth side down with supports. You'll need 2 instances of each half. I used M5x30mm nuts and bolts with washers to secure it around the bottom and top part of the posts. I had to cut away the dust sleeve, which may shorten the life of your class 4 piston, but replacement parts run about £20 from what I've seen. This was specifically made for the GT Omega office chairs, but it may work for any office chair with a class 4 piston (dimensions m