Hi Michael
Thank you very much for all these detailed explanations.
I am new to 3D drafting. I do AutoCAD without 3D so I fell I need to get a hold of the 3D drafting concept.

How do you show surface control points like on ring_fillet8.jpg?
First I click on the 3d surface and than on “Show pts”? This does not work for me – am I missing something?

What is Network?

All these problem areas effecting fillet – are they going to effect other manipulations of the surface such of Booleans, sweeps?

Please see the attachment. How do I make the bottom point of one rail meet the other rail (right view). I do not have stretch like in ACAD. If I use the control point – in is not on the rail – it is off the rail – so snap will not work. Scale will scale will the whole rail. The only way I see is to explode/trim the rail then I have a snap but I am loosing smoothness of the bottom part.

-Thanks - Olga-