I had an idea for the return east function, but seeing as how you have that taken care of, I'm going to stay out of it. I do however have another idea, since Q4 is getting hot, why not make a circuit that will cool it? Really simple to make and can be part of a different circuit. I'm under the assumtion that this is going to be outside (if not I'm going to have to drive all the way down to Tennessee just to smack some sense into you
). You'll obviously need to make a housing for your circuit. The fan can just sit at the bottom of the housing to cool (so rain does not get in). I can have the circuit ready for you today if you want.
Also, If you still want to make the "North" and "South" functions, then my idea for the return to east will be really simple (and good).