Just a guess from when I needed to model a hose with ribbed features in SolidWorks years ago.

I would just array / pattern the outside features along the path that I wanted, much like what it appears that you did, or at least the output was the same.

Then I would just sweep a cylinder along the same path of the right diameter to contact the outer features the whole way along the path.

If you need them to be a single item then join when completed.