Took inspiration from a model I found on thingiverse but started from scratch to make the rail a bit bigger to add stiffness. Models include a portafilter holder, RDT bottle holder, general hook, and a tamper holder specifically for the Decent tamper. Current sizes work good for snug fitment on my machine but adjusting the rail scaling slightly may be needed to tune for your machine.
Original Inspiration:
https://www.thingiverse.com/thing:5415498
The author marked this model as their own original creation.