While I have your attention, thought I'd give a little forge warning.
You know the large circular ramps? Well if you plan to use them, upside down, as platforms, then that there is a collision issue with them. I'm using them for this on my Monument Park map and found that players can get stuck halfway through them. You can experience this issue in Forge. Croutch jumping seems to get you out of this hidden hole. To fix it, for your map, simple add a 2x2 object just below the surface. Or use a Y piece to prevent visiable geometry from showing through.