Parts have all arrived. So now it's time to fabricate the front panel and wire everything up. I have basically rewritten the matrix library to support a full 5x7 font (eliminated the sprite class and substituted some print functions). Code is in place to use the Rubidium PPS signal to accurately set the RTC clock during times of no GPS signal. Finalizing desired menu items. Need to find a couple suitable panel-mount pushbuttons to support basic menu items.

Also considering whether to include leap-second handling and how to do it if so.