Very much inspired by @makerbro's Cube Puzzle, I've been designing a set of toys that use a similar helical pattern. Here's a video showing some interaction and some instruction if you print.

I often want to keep various purged materials separate for recycling or repurposing so I created stacking purge bins. I use this to keep incompatible materials or different colors from mixing. I created this for the X1. I believe it fits the P1 but someone please confirm.

A spherical hole at one end iteratively splits as it passes through a cylinder, resulting in increasingly fine passages and chambers, exiting the opposite side as a fine mesh pattern. To create this sculpture, I Boolean subtracted a variation of a double developing dragon curve from a cylinder, then sliced it into four pieces to expose the resulting structure.

I needed an oil filter removal tool. First one I tried was incompatible with my application so I quickly modeled and printed this. I had a feeling I'd need more torque and I added a 1/2 inch socket interface which proved useful.