Jacoby makes their Kielwood shafts with a Schon joint They also make their Ultra wood shafts in Schon joints. Both Kielwood and Ultra come in 11.8 mm, and 12.75 mm. I have their Ultra and kielwood shafts for Schon in 12.75 MM that I have turned all down to 12.5 mm. Both versions seem to be low deflection with the Kilewood the lowest. I like both, but really like the Kielwood. It did take some modification from me to balance the way I wanted.
The shaft the way it came was about 3.5 oz, just too light for my balance wants so I added .3 oz at the joint area.
I forgot to mention I have a couple solid maple Schon shafts that I have turned down, One to 12 mm, and one to about 12.25 mm. I like the 12.25 mm the most, but the 12 mm one is lower deflection.