Looking at wobblybobs sectioned picture you have the oil pump drive gears on the bottom of the shaft, the shaft then tapers in a little to a parallel shiney section this is the location of the lower roller bearing. If you follow the shaft up it becomes obscured by the horizontal torque shaft. Just to the right of the torque indicating gubbins where the shaft reappears is a light coloured band on the main shaft running parallel to the torque shaft, this is where the crack occurred. Shaft length reduced by about half. 1/3 of the bearings now not doing anything.