Peter,
The open time was my point, some people may like having extra time, to set up clamps for alignment. For seasoned builders, it may not appeal to them, because of the longer cure time. However, for a first time builder, they may prefer the extra time for clamping and alignment purposes. Since the NX STUDIO isn't a typical small box speaker build, this is another option adhesive wise. Both adhesives, Titebond Extended & SYTEMTHREE T-88, are good available options.

In regards to the spiral bit, I agree with you peterJ, I was able to use my bit with success, but would encourage others to refer to the link you suggested above. I will be purchaing one, for my next veneering project for sure! Thanks Peter!
https://www.systemthree.com/