Connecting ramp in Constructor

So I have played Marble Blast for a while and have recently got back into it. I decided to make an interior in constructor, and I have made a few before. The interior planned is to be a sort of pump track, but for a MBG level I am creating.

Problem:
I have this half bowl-shaped structure and a platform, and I can't find a way of connecting them smoothly. I only know how to connect it by stretching the end face of each pie slice on the z axis, but it goes down in chunks and this is not smooth.

On the intermediate level (MBG), called Moto Marblecross, they have used triangles to create this half-bowl, but they are not aligned as well, and not as smooth.

The image of the objects I am trying to connect is attached and so is the map file. By the way ignore the trims for now. Can anyone please help?

This may be wayyy too late but this is what I came up with, needs a bit more adjusting and couldve used way more slices to get it smoother.

Yeah that's great thanks. It converts to a dif fine and's very smooth. So it can be placed on the other side of the half-bowl shape, is there an easy way to rotate it 180°?

You can rotate it by pressing E, but I think what you'd want to do is press R then scale it by -1 on the X axis.

Weather wrote: Press R then scale it by -1 on the X axis.

TIL

When I press R and set scale x to -1, it seems to turn each individual brush rather than the whole thing as shown in the image below. Grouping the brushes doesn't change this.

Is there a way to rotate it as if it were just 1 brush? (or maybe I actually want to flip it, so it's like it's being reflected in a mirror)

I fixed it for you, as the whole "scale to -1" thing appears to only work on Windows.

Thank you. Fortunately, I have this Parallels Desktop, where I can run Windows whilst using Mac OS at the same time. I just alternate between them, to rotate stuff.