Would be nice to have Duct Flange settings. I mean real ones, not unions, and have them function exactly like AutoCAD MEP, where if you use a grip to pull a joint one way, it pulls the entire run, and will intelligently adjust any elbows or offsets accordingly. And this should not be a tool that you can only apply after a duct run has been routed, but rather has preset joint lengths and flange settings, which will auto-populate during the duct routing process.