[SP] Loud Pipes
Michiel - I assume you are referencing Djinndrache's video. Throwing the box up in the air like that is technically a bug in the physics engine and isn't the intended solution (although an interesting one that I plan to leave in for the more experienced portal players). As for hints:
2. Remember that a box doesn't obtain sufficient velocity going through a portal by itself, but
will maintain it if being carried.
3. Remember that the player weighs less than the box and that the box can be thrown above your character.
If you still can't get it, I'll continue to give you hints or the solution.
Good luck!
thanks for the hint.
I eventually found this way without the runway:
Then use the panel next to the "box-button" to spray blue over the two buttons.
Then you use the smal spot of blue next to the button (that makes the red gel flow) and jump with the box in your hand on the blue on the runway. You jump high enough to just put the box throug the red stripes.
thanks!
really enjoyed this, love the idea of painting the ceiling and floor and bouncing between them! however, like many others, i also got stuck getting the cube through the death grill, i admit to having to read this thread to find out how to do so lol. really good map!
I think in terms of boolean variables. Generally, it makes things easier.
I'm glad you enjoyed the map, Spam Nugget. Also, you're the first person to comment on the repulsion gel "infini-bounce." 
Just out of curiosity, what attempts did you try out to get the box over before you found out the solution? I'm going to try to make it more obvious for future players.
By the way, I'm not sure if I mentioned this before, but have you considered replacing the death field in the light bridge puzzle with a metal grille? The testing element looks out of place in Old Aperture, and it's just one more way for the player to die; it could be replaced with a grille wthout any loss of function at all. I don't think you could replace it in the final puzzle, though... Your other option is to create a new, custom 1960s death field texture. 
If you could, that would look amazing, and would finish this map off for me.
That's odd. It is a 1960's death field. I'm using the underground fizzler parts for its emitters instead of the usual red Aperture pieces. The only problem is that the red lines don't sync up as well as they do with the modern fizzler parts.
I also like using the death ray because A) it makes the box dropper more visible and B) it's my attempt to trap people into thinking they want to get the box out through the front until the obvious solution becomes clear.
EDIT: Ah, you mean the textures. I was intending to, but I recently switched computer operating systems and I haven't brought over my Photoshop, yet. However, the emitters for the field should be from the underground set.
well, i tried several things: painting the floor panel by the button blue, then placing a portal on the angled panel, bouncing on the blue panel with the cube then letting go of the cube, putting a portal underneath it and moving; I tried painting the cube blue and having it bouncethrough the field, but of course when it didnt fly of the edge of the map, it still was painted and as such didnt work on the floor button; i tried simply using the speed gel to fling through the death field; I tried painting the cube orange and sliding it along the floor to try and fling it; I tried painting the floor on the other side of the death grill blue via the overhead panel then bouncing to see if I could shoot a portal through the death grill; I tried using the speed gel runway to launch me up out of the floor panel under the pipes to see if i could put a portal through the death grill; thats about it off the top of my head lol. hope it helps! I think my biggest problem is that at first i kept trying to find a way to use the bounce gel to get the cube through, having just received the means to access it.
I think in terms of boolean variables. Generally, it makes things easier.
Yes - I've noticed that players often associate getting the box to using it on the repulsion gel, either forgetting that there's a box-button on the other side or thinking that the repulsion gel is used more than just the tip of the final puzzle. I am unsure on how to direct players in a better fashion at the moment, but I will think it over and try to come up with a solution that promotes better player direction while not making the puzzle too obvious.
Thank you, Spam Nugget. I appreciate you revealing your thought process on that part and will take it into consideration for future updates and maps.
personally, I am amzed at how well textured the map was. All of the testures matched the theme, and fit well into the gameplay. I also had the same problem that spam nugget had with getting the cube through.
Blendmaster345 -
Thank you! I spent much of my time observing Old Aperture levels in Valve's campaign (I have over 500 hours logged for Portal 2 ) as well as taking reference screenshots. Style and aesthetic design is very important to me.
As for the problem: as stated in my note to Spam Nugget, I am currently working on a way to make that part more obvious to the player. Thanks for playing!