Jon,.. you can also turn on the visual min radius for 3D sketches but yeah, ... hmm... as for enforcing.. I don't have the Routing/Piping/Wiring extention... but I thought someone talked about this and showed something?
Otherwise.. the best I'd suggest is do a "Fit Spline" to convert your 3D line/arc (min radii) path//profile/gc sketch?
Yes I want to enforce the radius though so it does not go below a certain value no matter what. At this point it does not seem to be possible. I tried it the other night in a different CAD system and it did work fine in that system but I can't seem to get it to work in SW. Also VAR does not have a solution either.