A PTI map (I did some minor touching up in Hammer, but nothing drastic, it was almost all made in the PTI editor) featuring fizzler puzzles, momentum boosting, and a wild and bouncy faith plate ride.

Changelog:

V 1.0: Initial Release

V 1.1: Added laser across jump pit to prevent players from accessing it before disabling lasers across exit of the large chamber, fixed ceiling in room with cubes, fizzlers and platform (thanks to zivi7 for those tips), fixed the kill trigger for the death goo below the excursion funnel so that it now extends the entire length of the channel

PTI audio has now been fixed, and plays correctly

Click here to download On A Rail

This was alright fun. Two things though:

In the room above the starting area, why is that rising platform there? It's not needed because of the portal-able surfaces around the hand button.

At the momentum booster part, the player might do the fling first and then realize he goofed by not turning off the laser field first. Maybe you could make it so that the abyss needed for the fling only becomes accessible after pressing the laser field button. For example, create a laser field in front of it that gets turned off at the same time as the other one.

With regards for your first point, I hadn't intended for that ceiling to be portalable I just simply forgot it.

With regards to the second, good idea I hadn't thought of that. Incorporated both suggestions into an update (connected the second laser field to the same button that turns off the field at the exit to the chamber). Ironically enough I had initially only put that room in to allow players to get an overview of the chamber but I figured if I put something into it then it would give players a reason to go up and take a look, appreciate the feedback thank you