Often, our installation becomes slowly misaligned due to various factors like projector bulb replacement, air filter replacement, HDMI cable issues. When we have 10-30 quads per projector (x 10 projectors stitched together), this becomes impossible to quickly fix the alignment inside Madmapper.
The only "fix" I know of, is to use the UV checkerboard, and try to physically move the projector back into alignment as close as possible - ie eyeball it. If it gets really bad, I place another animation or object to cover up the poorly misaligned meshwarping
The real fix takes hours to a full day, to rebuild all the overlapping quads & mesh warping again with the UV checkerboard, then recreate the groups to create the various scenes across all the projectors, it's easily a days worth of work - when the projector needs to be live nearly every day this is not an easy thing to schedule.
It would be nice to have a set of "Master" quads (locked), and their children "quads" clone all the settings of the master quad. Then if I see misalignment, can jump into the master quads - fix the mesh warping points - easily a 5-minute task. This would magically trickle down to all the children quads in every group.