Feature Request: Weld Command

I know I have asked for this in the past but could not find the original post. Here is example:

Let’s say I have two curved surfaces that can be joined. Then I do offsetsrf to the convex side on each of the surfaces. In that case I can get a small gap between the resulting solids towards the outer face.

It would be useful to have a Weld commend that allows a union of two such solids,

Problem Weld.3dm.zip (4.5 MB)