Very nice! 
OK, I think I understand.
Did you run your power lines next to the LED strips? And if so, did you run one bus line off the 60 amp all the way down the strips and then tap in for each 5 amp tap/injection? Or did you run several pairs of 5 amp wires from the power supply (so to speak)?
Or maybe you fed the power in/out of the attic at the various injection points?