1. Cube droppers - There should be only dropperless cubes in this map like in Portal 1.
2. Laser Emitter and Catcher - These don't belong in test chamber 13 from portal 1, you shouldn't replace the Energy Pellets with lasers in this test chamber just fixed the damaged pellet launcher and catcher, so please change the lasers back to pellets.
3. Unstationary Scaffold Missing - You are missing the unstationary scaffold for the dropperless cube, you need that scaffold to get the cube.
4. Indicators in the Pellet room are missing, please fix it so there is connection coming from an output to it's input.