""""""""""""Any reason for make an extrude and not directly a simple Trim with the "rectangle"?"""""""""""

I had some issues with using the curve. I probably could have "flattened" it and had it work. It's just a method I use when I have problems with the trim curve because it seems to be a more "direct trim" as opposed to the "projected" one. Maybe Michael can comment on this. Like "having the trim curve be non-planar made it a different calc or something.