i played and i was scared of it it was very difficult

Good chamber but not sure what the point was of:
1) The companion cube in the dark turret area. You can't take it anywhere and you're likely to be shot to death by trying to get it
2) The other frankencube in the light bridge area. You can't take that anywhere either.

I would like some more space when doing the double stacking in the first part, the area on the second level.

The part with the hard light bridge made me think that I had to pre-portal before readching the hard light bridge. I didn't know I could make a portal without having to go back, like in Duncan's video. I went and died and had to start all over. If I was supposed to do it like Duncan, then the portal surface on the far end needs to be more easily portal-able.