THOR
don't get me wrong your Arduino-based DCC Turnout Controller is way cool!
FOR ME, I am designing a circuit to replace the DZ-2501 controllers with a mom contact switch and two LEDs for smaller control panel use (and to NOT have both LEDs lit) as soon as I learn Eagle to then create a circuit to test.
Sparkfun that you mention in your prior thread seems the way to go to learn Eagle. (When I was in engineering at U of I, I hated circuit design which is why I went into civil/structural.)
So this should be a challenge for me, even with all this new time !!