that way only Mega signal lines and a ground would have to wire between them.
What do you mean?
It's basically a "motherboard", but not too large in size...
I was planning to have two of these:
which come both in to-3 and to-22 forms... One for the servos, the other for the rest.
As an addon question, what is the category/type of the "polarity protection diode" between the power jack and the regulator? I will need to change that accordingly too.
Not to bombard with questions, but much of this is a new area to me, so one more thing: What is the diode exactly for? I get the concept, but what exactly would cause "backflow" of current on the board?