Hi Jeff - how would you expect the UI for a surface/surface variable radius fillet to work?

With the edge-based one it should be possible to click on spots on the edge to indicate the radius at a particular point. With a surface/surface one there isn't really an equivalent existing clickable thing like that to control it with.

So because of that I think a surface/surface variable radius fillet is probably going to be difficult to design well as compared to an edge based one - that's why probably an edge based one will be a focus first and a surface/surface one of this type may not make it into MoI v3.

- Michael