I don’t recall if I posted earlier, but…
Before mounting Teensy, or Micros, make sure to test the power at the headers to be sure voltage is correct.
Test from circled pin to ground
On all boards.
Just good insurance since a micro costs more than the rest of the components combined. 
Teensy tests 5 volts
Micros and xbee test 3.3 volts
ADS pin tests 5 volts from the linear regulator
This will insure that all 3 regulators are installed and working correctly before modules are attached.