I've spent quite some time trying to find out why my 700's decided to stop receiving gps signals. Turn's out it hasn't.
As I now know, the 700 has a Sirfii and so doesn't support Quickfix - so TT weren't being nasty after all all those years ago.
I've managed to use the information on an XL to see which sats the info's coming from. Turns out the 700 is all over the place and ...