Ok, tested it.
On the one hand... wow, it fixed the poor Springer's mis-welded verts really nicely:
And it finally fixed the SpireRook, which has had some minor tesselation issues in Spring since I put it in... fixed up some artifacts showing up on the Strider, etc. Basically, I am totally pleased with the results on things with rounded curves.
On the other hand... it totally borked the Lord, which was very deliberately un-welded to create razor-sharp edges. And having tested things, it appears that models that mix unwelded sections with welded sections end up 100% welded, too... which makes certain types of shapes come out very rounded-feeling even when I'd prefer otherwise
I know that it's gotta be extremely hard to come up with an automatic routine to handle this, so I'd like to just have the option to unweld the verts by Piece- the new welding routine is just about perfect, though, so if I just have to cut down my use of reflectivity to hide problems that arise from this, so be it.
That said... it's about the only complaint I can come up with at the moment, other than the un-finished-ness of the animation exporter, which I can definately live with.
What I see in UpSpring now cooresponds to what I'm going to see in Spring, it appears, my animations are not borked, and the Move Origin tool works WONDERFULLY. You really have no idea how much work that's going to save people, JC. Really. There are a lot've complex designs I have rejected, frankly, because I didn't want to have to set the origins for so many parts. Now if I could only mirror Pieces, so that I only had to do it once for things with bilateral symnetry, that'd be perfect, and make animations that at least gave me a starting-point for scripting, I'd say that this was just about as complete as it needs to be... but I can definately live with what 1.4 can do. Excellent work :-D