Do you remember the VIN from the 1000? Over on the GS-source someone had put out "Have your friend to check VIN# on steering column; should start with GS1000-52xxx ". It doesn't say that it needs to have an s on the end, just numbers. I'm no expert though.
Looks like you have made some nice picks so far. Bet its fun going thru wondering what all you can find!