BTW, forgot to mention, I also have a board that has a MAX232 RS-232 converter, DE9 connector, voltage regulator (can use 3.3 or 5V), and connectors/mounting holes for the CN06, Adafuit, and Trimble Resolution-T receivers (also works with the SV6, ACE, etc receivers with the 2mm 2x4 connector). It has a programmable polarity 1PPS driver for the DE9 connector. There is also a small proto area and a footprint for an ATTINY processor. There is a jumper that lets you power the circuit/GPS from either the regulator or the DC input jack and a jumper for connecting the DC jack to the DE9 connector (or you can wire the regulator to the DE9). I wan't planning on building more, but if there is interest...