Trouble creating form

I'm having trouble creating a form as a mass. Initially, I created it in Rhino and imported it into an In-Place mass as an SAT. First attempt was a fail because Revit couldn't do Wall-by-Face on the end parts. So I tried a few other ways of creating the geometry in Rhino. Revit either couldn't create the Wall-by-Face or couldn't even create the geometry.

So I decided to create the mass as a Revit Conceptual Mass. There I'm having trouble even creating the mass from scratch!

I've been using splines, but I'd be happy to approximate the edge curves as tangent arcs. Anything that works at this point. As you can see it is essentially a flattened half-cylinder with squished quarter spheres.

Attachment 94001

how's this?

That may work! I'll take a closer look. How did you create the end?

Quote:

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Originally Posted by damon.sidel

That may work! I'll take a closer look. How did you create the end?

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sorry it took so long for me to answer back, i kinda forgot i posted here.

The end is just a 180º revolve around an axis. i created both profile and axis as reference lines, so you can find them again in the file.