The Welec buttons themselves are a very appealing feature of this rig. These are soft, translucent silicone things. The oval shaped ones are backlit by coloured LEDs when active, and they sometimes even change colour: Eg. green/red for running/stopped on the Run/Stop button).

Great visual feedback that way. There are not too many buttons, and they use differing shapes/sizes/colours to facilitate navigation among them.

EDIT: The scroll knobs, on the other hand.. are little clicky rotary encoders, with a fairly low speed limit. Nothing like the scroll wheel on the Tek scopes.