So, if

1) I'd known you had a Sony CS1 GPS data logger you didn't use, and
2) it created a NMEA data file, and
3) the data file was compatible with the free locr software, and
4) the software could geotag pics from any camera such as a Fuji, Nikon, Canon etc, not just a Sony, and
5) it was for sale

I could have bought it off you and saved a few quid ?