Yes, several 650 and 630 plus one 640 made by Jean-Luc Joie, mostly cedar-topped and of the same model and fabrication period - including one spruce 650 and one spruce 630 but those ones not side by side.
You're right but Jean-Luc Joie, for instance, uses the same body sizes on his 630 and 640 as on his 650.
Yes the thumb to pink span has some merit, but definitely is not the definitive test. There are multiple factors to consider such as the length of ones fingers, overall size of their hand, flexibility, etc. Since every player is so unique, the only way to really know is if one actually tries different guitars of different scale lengths.Setareh Pishdad wrote: ↑Thu Sep 14, 2017 8:01 pmI am considering switching to a short scale (630mm), I've noticed many people refer to the thumb to pinky stretch span, however I think you can still benefit from having a short scale if your span is 8" because that measurement does not take into account your individual reach between 2 and 3 and 3 and 4. Does anyone know if that has been taken into consideration when transitioning to a short scale?
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