Very annoying, mostly because the slanted bit is so close to the ground, giving you almost no time to adjust your viewing angle to place the next portal.
You should upload to here on the database, but im going to test it now and get back to you.
Yeah it's way to tough, mainly takes forever to get enough speed.
Thanks for the feedback. The fling that I will be using of this type in my map will certainly be easier.
dear god my mouse kept getting caught on the way out the slanted surface and ended up taking around 10 minutes to do D=