Hi Chipp, MoI's blend tool does not have an option to set "position matching only" on one side of the blend which is what is being used in this case. Probably your best bet is to use Rhino for this one since you will then be able to follow the steps.

> had an idea on how to edit an existing surface to add the convex edge?

Well, you're not going to be able to edit the surface's control points to make that kind of arbitrarily directioned ridge in the middle of the surface, if that's what you mean by surface editing.

It's most likely going to be some other set of surfaces coming up from the main one.

- Michael