Never owned a tilt display keyboard, never needed a tilt display, indoors or outdoors. The amount of time a player needs to see the screen is a few seconds when they select a song - after that, your eyes should be on the audience. Tilt and touch screen displays are meaningless for me.

Gary cool
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!

K+E=W (Knowledge Plus Experience = Wisdom.)