Things you will need :-
8x M4x8x6 threaded inserts - https://www.amazon.co.uk/dp/B0BTH1HH9P?ref=ppx_yo2ov_dt_b_fed_asin_title
8x M4x6 bolt - I already had these.
2x 13mm Nut - I already had these.
1x really long threaded rod for the 13mm bolt
2x Underdesk sliders - https://www.ironmongerydirect.co.uk/product/klug-27mm-ball-bearing-keyboard-slide-drawer-runner-adjustable-height-350mm-length-black-485704
I printed this in PETG black on my Creailty K1 so I had to cut this in half and mirror it. It printed in 10hrs.
The nut in the middle is for holding the keyboard so it doesn't bend
Also you just need to mirror the model for the other side you need
The author marked this model as their own original creation.