We have recently purchased a new 3G asset tracker with the updated GPS shield. I can report that after a firmware update it seems to be working pretty well, we have verified the location accuracy is very good for this sort of device. My question is if there is a place where we can get the schematics for this system? Before i have my tech start hacking on it to do our hardware modifications it would help a lot to not have to trace everything out on the board. This is our first foray into the Particle world but so far it has been a fairly good experience.