Skyler, Good afternoon. I saw your post regarding the RTCM-GPS-18x LVC question. I would use the app_rpt site but cannot seem to get registered. I have tried many times to get registered on the app_rpt users but it always comes back no such user!!! Here's the question: I have two of the same RTCM and Garmin GPS 18x LVC. I have been completely unable to get either to work. I followed your wiring: RTCM GPS 18x LVC 6 GRX <-- Rx Data 6 Green 7 GPPS <-- Pulse Output 1 Yellow 8 GND Ground 3 Black 8 GND Ground 5 Black 13 +5V -->Vin 2 Red 14 GTX --> TX Data 4 White No joy. Did you get yours working? Anything you can share? I have a feeling that the Garmin's have been reprogrammed to something other than factory default 4800 in the PGRMF. Tnx, Mark DuMoulin Sr. WB2ERS 800-410-3130