@Windsurfnut The only GPS configuration needed for PP is as I stated - it should be set to output the RMC sentence only and needs to run at 4800 bps. Aaron at PP told me that newer firmware revisions retain the configuration when upgrading the firmware. Yours probably had one of these newer revisions before your upgrade so you didn't have to make any changes. Every one that I've done, quite a few for ZO and PP, I had to reset the configurations. They must have all had older firmware. Which version will or will not require the configuration to be reset I can't tell you - you will know if you can't communicate with the puck using the update software at the required 4800 bps for PP or 38400 for ZO. Every firmware update I did caused the puck to revert to 19200 bps.