The Key Holder (Prototype 1)

Hello! Here is the prototype design of the anticipated Key Holder I posted on Reddit a couple of weeks ago
https://www.reddit.com/r/EDC/comments/b270gb/i_have_a_dream_one_day_all_my_keys_will_be_nearly/?utm_source=share&utm_medium=web2x

This is a prototype version: print it and test it, in two weeks I'll make another post on Reddit to get all the comments and improve the design for the final version, as I'm not still sure on the current design.
It requires 4 countersunk M5 bolts (standard ISO measurement) and maybe some work on the keys to fit properly.
I've added some different thickness washers to replace the keys if you have an uneven number of them.
Comment also on here for any suggestions on the final design, which will have a blank top and bottom so you can customize it as you wish.

Thank you for being a "beta tester"!