I like the side bin I have for my MK3S+. It's really handy. However, the rounded slopes towards the bottom of the bin didn't print as clean as I would've liked. So I had the thought in back my mind that if ever I was making one, I would prefer to use flat surfaces versus rounded. That opportunity came much quicker than I was expecting, because I have my brother's Ender 3 v2 for a few months while he's doing a remodel. I am printing him some little upgrades as a thank you for letting me use it.
I printed this on my MK3S+ because I had a larger nozzle in it at the time. The overhang where the bin clips into the frame of the printer does need supports. The sliced files are using organic supports, which were very easy to remove even in the PETG I used.

The author marked this model as their own original creation.