marKiu wrote:
I think it can... If you stand one on a cube on the lightbridge you can shoot a portal to the very end of the tunnel. Once the cube dropped into the pit he can always get it out with the blue funnel.
I think you need to make the hole in the upper glasswindow smaller to prevent this.
You're right, this was possible. Edit: ah I see Jacu has done it as well. I made another update in v1.3 which just adds a glass panel to prevent this shooting angle. The intended solution is certainly not some evil special trick, it's just a bit different. Feel free to upload videos any time now. Mine is ready to go if you guys want.
@sicklebrick: thanks a lot, I appreciate that 



Just you wait though, I'll practise with other hard maps, and then solve future maps like these!