Wow, dude, I've been a member of that forum for the longest time, I had the game for the longest time. Never have a seen any loops.
Yes, AJ, or furiousfox had slopes in the game at one point, they did not work out well. So they were scrapped.
Show me a mod with slopes or loops.
Someone take a screenshot of the first part of level one with the slope, because I do not remember one being there.
I stopped playing the game and going to their message boards because most of them are complete douchbags.