So yeah. I love making test chambers. So far, I have 4 test chambers published, but two of them aren't really good so I won't be posting them here.
Anyway here goes.
Lasers and Pellets
Difficulty: moderate - hard (slightly more to the hard side)
Turns out someone ported pellets to Portal 2. I absolutely love pellets so I just had to make a map with it. Besides, what could go wrong when you're in a room with deadly lasers and high-energy pellets?
Pictures (no spoilers in here)Note: in order to get the models for the catcher/emitter, you have to install BEEMod 1.05: http://portal2backstock.com/bee/
This mod adds more elements to the puzzle creator, like MASHY SPIKE PLATES!!!11!! and logic gates, so it's a must-have!

Fuzz(wipname)
Difficulty: moderate

I was playing Portal X (aka portal prelude), and then I hit map #36. I loved the mechanism that was used in this so much that I decided to make a full-blown spin-off. Note that it's not 100% finished yet, but it's solveable.

Pictures:

All maps are located at my Steam Workshop. Note that because Fuzz is still a WIP, I haven't yet published it publicly. You have to be friends with me to grab it (most members over here are iirc, but just fyi)

Thanks I let cooliojazz playtest lasers and pellets yesterday, so based on his feedback I might alter the chamber a bit. Hold on tight, panels might start moving suddenly...
Also, I'm actively looking for chamber ideas, so if you have a puzzle mechanism that you think I could use (and test assured, I can ), please share it, preferably in a spoiler so as not to spoil the solution to others