I can't believe how we overcomplicated this when it came to simply preparing a portal and swapping the light bridge source to get to the cube! Embarassing... ^^
Besides that the chamber is even easier than the previous ones :-) nonetheless entertaining and challenging.

Very nice one, but it is possible to find tiny gaps at corners or edges of glass :( You can fix this by just rotating the glass orientation by 180°. We didn't abuse this though to solve it.

I liked it, the observation rooms for the other player was a really nice touch, all the maps should have that (you should also tell players about +remote_view in the descriptions, it would be most helpful as well). The puzzle was good too, not too hard, but still a nice challange, gonna try the next now. 8.5/10