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For another thread, I spent maybe less than 10 min having a bit of fun....
*Yawn* Bored.....
You have too much free time...
Something looks odd in the middle and you have a non-tangency at the bottom. If you're bored, maybe work on those...
'Morning Tom! Just goofing around. My license server seems to be FUBAR'd so I can't even get in to look at it right now. I'm sure it's just the bend being too sharp in those locations for the diameter of the tube.
That took me all of 5 minutes based on the trajectory I already had. I just threw something together. Most of what I do now is based on simple shapes (planar, developable). Gotta do something to have a little fun!
You should upload a Creo model so people can see how you make these.