If you've printed and are using this niche holder , I'd be thrilled to hear about what venue it's being used in, feel free to share your experiences.

For optimal printing, I recommend using the largest and flattest side (the one that is vertical with the desk) and adding supports for the most extensive bridge. 

The keypad I utilized for this project is the ELSRA Macro Numeric Keypad with 26 Programmable Keys, available at https://amzn.eu/d/45LXNb3.

If you would like to know more about what macros I used, let me know.