And now for something Completely Different!

Main brains only got 1 track left.
Ya gotta tell me when to switch to track B ...

OK, back to the first problem.
I've got this code for the last schematic.
It hasn't even seen an electron yet, but I think it's close, although it's guaranteed to change.

I'm trying to make a breadboard for it.
But it's going slower than anticipated. (blame Half-Life).

Here's what I got ...
http://www.pbpgroup.com/files/ZeroDelay1.htm
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