Made a few tweaks so the boxes will fit better also added clips on the lids so they stay in place and keep everything out of the way of the bed
I adapted the tray for the Prusa i3 MK3S as the Y belt tensioner was catching with the original MK3 design. Also designed two lids for the boxes as I like it as they look neat and clean when covered.
I would advise to print in PETG as that area can get hot
Be careful as you mount the tray as it takes a little bit more force to put it in and make sure it doesn't catch your flat cables from the LCD. They can be put inside the extrusions