Hi,

I can certainly vouch for a JazzCNC when it comes to building guitars. I got my Jazz9060 for the purpose of building guitars at the back end of March as a complete CNC newbies and its a cracking piece of kit. I'm currently working on a Les Paul with my CNC which you can see the progress of here ...

http://www.mycncuk.com/threads/14702...azzCNC-machine

A 4th axis would be very useful for you, especially when it comes to Jazz guitar necks which often have a far deeper heel much like that of an acoustic guitar, being able to machine that heel with a rotating neck blank would be a great help and avoid the issues of using pins to flip the blank 4 times or struggling to find cutters that would do it all from the blank being fretboard down.

What I most appreciate about my Jazz CNC is that "it just works" which for a beginner to CNC cannot be overlooked, there's no pulling your hair out like you may do with a cheaper / inferior machine. I use Fusion 360 and I just export my G code as Mach3 tap files and load it into UCCNC and it cuts just as I would expect.

Hope this helps with your choice of a machine

Ben