I just replaced mine. I believe the bolts are 10mm with 1.50 (coarse) pitch. The length is approximately 70mm.
The easiest way I have found to remove the outer shaft from the center mount/bearing is to remove the whole assembly. Then hold the assembly up in the air by the jackshaft (inner shaft). Without striking the center bearing, hit the inner shaft with a hammer, moving slowly around in a circle. This will take a few minutes to slowly separate. Often the shaft splines get stuck, almost like at the spindle side. The other option is to use the special tools or a press, though some may luck out and be able to free the assembly with a pry bar (if they don't mess up the center bearing assembly).
I made a short video as I removed mine. If anyone is interested ill upload it.