Now, my original though was to clamp this on the actual arm of my chair at the end, but because of the padding on the chair arm, it was not stable, but again, my center keyboard mount worked out much better. Basically, for $45, I made myself a sweet gaming chair.—–Updated: No longer even using the chair arms for support.

https://www.amazon.com/VIVO-Adjustable-Computer-Extended-MOUNT-MS01A/dp/B07NLLZS8X