I've searched the threads and I can't seem to find these answers. I also asked in the Geddy Lee Jazz Club but I haven't gotten a response. I've been going back and forth between two different stores trying out the Geddy Lee Jazz. One store has one with a better setup with junky strings and the other store has one that has slightly higher action with better strings, they're probably Rotosounds actually. They both play great and sound great, but one feels slightly more solid then the other. It's not a matter of the playablity feeling more solid, it's more of just when you hold it in your hands. I don't know if it's my imagination or not. Of course the one that feels more solid is slightly more expensive then the other store and you really can't haggle at all with either store anymore. I've read that the early Geddy Lee Jazz models had issues with the tuning heads and neck stability. I'm wondering if the more solid feeling/more expensive bass is the newer model. Can you tell by looking at the tuning heads if it's the older model? I looked at the back of the less solid feeling/less expensive bass and took note of it's appearance. I still haven't gone back to the other store yet to compare. Also, do any of the Geddy Lee Jazz basses have an "F" or "Fender" stamp on the neck plate? The one I looked at today did not have it. Are there any apparent visual differences that separate the older models from the newer models?