The PRISM's 3 LED HUD is about in the middle between the single LED displays and the large ones on the Ouroboros and MK-5P ... as is the info you get from it. Battery and cell warning in addition 3 color setpoint status. The two big ones also give deco info.

Ambient Pressure has a good size, but the 4 LEDs are in the back.
Robert managed to make his HUD smaller, same with his secondary (the latter lost so much it needs a metal washer for reinforcement). He got rid of the stalk and mounted it low.
The last housed screen display was a bit larger than the current stock HUD, but much smaller than the prototype I photographed in '03.
Very nice pictures, Rich.
