Thanks for taking a crack at it Psygorn! I’m traveling now and so can’t view your .3dm, but am looking forward to it when I return.

Thanks Michael for confirming that there’s not a general method for assuring alignment of tangent edges. This came up because I got a part model made in Solidworks that had a tiny mismatch despite having a corner patch. The mismatch caused me grief while modifying the model. I guess that making a patch that matches the tangents up might be difficult in some cases.

- Peer