I decided to print my keyboard shelf parts on the P1S on PETG and gray color. But before that, I wanted to implement some changes to improve the mounting and sliding action.

Things I wanted to address in order of importance:

1. Improve sliding action and allow for grease
2. Use more standard screw length eliminating my custom spacers
3. Use PETG instead of PLA since the latter started shaving against the aluminum
4. Replace the ugly print quality of the older ones
5. Another color (gray, also neutral but different from desktop)

The image below shows the changes but in summary, I increased the side clearances to reduce/eliminate wall friction, strengthened the slider ribs and added a flange to help retain grease if added, and increased corner fillets (rounding) to reduce/eliminate stress concentrations:

For the screw mounting, the shortest screw length I found at the hardware store was 1″ so I adjusted the mount spacing to take 1/2″ so they would thread 1/2″ into my 3/4″ desktop. Also, I didn’t pre-drill holes for them so some material would kick-back/lift out around the screw which separated the flat surface on the mounting brackets so I added chamfering around the mounting holes to help take it:

Available to download at MakerWorld: https://makerworld.com/en/models/878613
And recently uploaded to Printables: https://www.printables.com/model/1144913-keyboard-megashelf-sliding-keyboard-and-peripheral

Here’s a gallery of the newly printed components:

*BONUS* AI generated images for keyboard trays: