What was wrong with the GPS sensor? (Pulling too much power so that the rest of the circuit doesn't run, or is it draining the battery too quickly, not allowing the battery to charge quick enough?)
How much did the past box cost?
Run the breakout box idea by him
Op-Amp Resistor - should we have the signal wire directly connected to the arduino. Or should we have the signal wire directly connected to the arduino. Or should we have a resistor for reasons such as the pull-up resistor to an LED?
Is there any drawbacks to having detachable parts?
What was the reasoning for having some parts directly soldered on and other parts detachable?