Hi Steve, also to answer your actual question - Sweep is probably the right tool for what you're trying to do.

It's a little hard for me to be 100% sure because I only see just one view of your model there and it's a little bit hard for me to understand the full shape that you're trying to create. When you post a question, it can really help if you also attach the 3DM model file with your actual objects in it so I can actually load the model file and look at it from various angles and zoom in on it, etc... all of which can't be done with just a screenshot.

- Michael