Just got a new keyboard tray!
The desk & chair combo at this setup had some height issues, with the desk being too high and the chair too low, and neither with height adjustability. So I was needing to either sit on my legs constantly, stretch my arms weirdly, or play with the keyboard directly on my lap. None of the above was really all that comfortable to do for any long stretch of time, so I decided to get a keyboard tray
This mostly solves all the issues I had, but the way it mounts left it an inch too low and running into my legs, and there's no way to adjust the height of the tray within the mechanism. This left me with only two real practical ways I could go about raising it up; either add a shim to the top between the clamp and desk, or remove the top clamp and drill directly into the table itself through the holes that currently go into the clamp
Soooo....
This is a bit cursed looking, but it's so many orders of magnitude more comfortable, so it's entirely worth it. I should probably stain them to get them more similar looking to the rest of the desk top, but functionally this is perfect.
If I decide to opt for the more time-consuming method of directly screwing it into the desk and ditching the clamps, the shims I made will be needed for that as well. The "wood" making up the desk top is too thin and weak to securely mount the tray onto, so it'll need the wood shims glued onto the bottom to give the screws more material to hold onto.
All in all, this tray is working out well so far, and after adding them shims it's solved most of the ergonomics problems with this computer setup.