I think that looks very cool, but I would never store a guitar with sideways tension on the neck like this, either the weight/gravity tension in the direction of the truss rod resistance or not at all for me.
I've got very limited wall space and with one hanger I'd like to be able to usually hang a Tele but at times a classical acoustic.
Will either of these be OK for both?
I got over my fear of hanging these on plaster: This past weekend I hung a flatscreen TV using anchors and it went very well. That wall isn't like some of the walls in this place where the plaster crumbles.
Interesting, I have 30 guitars on these.. but no Floyd Rose nuts currently -however -the Hercules hanger holds the guitar from the fluting point of the head (throat) which is usually 1 to 2 inches highers than the nut -so i don't picture how a Floyd Rose nut would be an issue -maybe post a picture? I really can't see this as an issue looking at mine