The Sage plugin doesn't work like it should... It does, but as a bunch of bugs... My colleague tried it and had to check all the programs to make sure it was compiling ok. I believe one big issue was that it wasn't UTF8 compatible and was detecting the program as non PVX program since it wasn't recognizing some characters like "éàûêà, etc... " that may have been used in comments line. We write comments mainly in french, so that happens a lot!
After it "detects" that the program ain't a PVX program, it markes it as an "archive ressource" and won't try to compile until you manually change it.
I think there was another issue where it wasn't recognizing the /* marker for comments. I'm not 100% about that one though... Anyway, maybe it was just a configuration issue at some point but we had lost too much time on it so just decided to revert to an older Eclipse version and use the original plugin which works perfectly fine on first try.
We would also like to use VS since that's what we use for non pvx coding as well.