This Pedal Train sponsored- site is kinda cool if you're building a pedal board...be it on one of their boards or otherwise.
http://pedalboardplanner.com/
I was able to do a mock-up of my current board (sans Pedal Power II and channel switchers) fairly quickly...
It by default tries to route it like a conventional in-line board's "signal chain" by the order you select the effects (not sure if there's a way around that yet)...so the arrows are completely out-of-whack with how I'm really running it...but anyway, cool, useful tool!
THEN you start thinking, "What if I got that MXR Super Comp and Carbon Copy Delay, and added an Expression pedal for the MM-4..."