Nice puzzle!

Stupid unkillable turrets :(
But very very good puzzle, very satisfying to solve.

excellent!

@j_p_smith Thanks and, looking again, I see what you mean: like this ?

@bullfrog Yes, that's intended; thanks for playing! At 1:46 in your video, an easier way to get back to the top is to use the portal that is already up there.

Well, I tried to watch their videos, but they are no longer available; so: intended solution ?

Good puzzle which definitely had to be thought through and the final sequence had me stumped for a while I'll watch the @DeathWish808's video and record my solution if different.

Cool, and very satisfying to solve. @quaternary, no the toss is not correct, but you are close.

I like it! I did a small box thrrow at the end (put the box over the grating, throw to the right, retrieve it from behind the fizzler) which I really hope is wrong.

I like the use of the turrets to enforce the correct solution.

Getting the cube is quite difficult, and frustrating - it seems the walls are placed just so precisely, so one could not use different soulution than the one thought by author. Once cube is obtained, the rest is quite easy.

Very nice work. Took me a lot long time but got ther in the end.

Nice. You had me working hard right to the end. Then I stalled and no amount of work was going to get it. I had to see the last step. I knew I had to have the cube on the exit side but I couldn't see (duh) the portal surfaces visible on both sides from the exit side of the barrier. Very good logic and a well designed map. Even without those pesky turrets it would stand. Thank you and I'll see ya round the workshop.

As I was testing my recording script, (it now warns me if my SSD is running out of space) I decided to re-record my solution for your map. I tried to do it as good as possible, and managed to not die. yay! You can view it here: https://www.youtube.com/watch?v=gIq__QYsUog

I was able to complete the map, but damn, this wasn't easy. Difficulty would be a 6/10 I'd say.

I died quite a few times due to the turret and the quick portal placement required. I'd recommend removing the turret, or at least shield it of to give more room for error. Especially since you have to do it twice.

I do love the puzzle mechanics used. The fact that you really have to learn the map and plan ahead nearly makes this a 7/10, but due to the small size of the map, its barely a 6.

I made a video too, but I was so smart to test a script and instead of actually running the script, I hit the delete temp files button and deleted the video. D'oh! :(
The key to the puzzle is to first use the first funnel and get past a point to get the other and move back. You have to do this a few times.

Replayed through it and the first part was actually easier doing it your way. Not sure why I didn't see that the first time. :-) I didn't use the portalable surface you moved back a block and put glass over it. So, I'm assuming I still did that part unintended, but it was much easier this time. Again, not sure why I didn't see that last time. So obvious.

Video: http://youtu.be/rhw6iUEtjzQ

Thanks, that was mostly intented. I've just fixed a few things.

Damn good map! Once I got to the area with the exit then I got completely stumped and was about to stop recording, but then I had an aha moment and realized I was over-thinking it. Very well done and very clever.

Video: http://youtu.be/GBMD0vWEsUE