I think the hub would have come off a lot easier Norm if you had of used a 20mm puller bolt and a thicker puller plate,I use a home made 14 mm plate and that has bent slightly, next time if I make another I would use thicker steel.
The two bolts that go into the bearing clamp break eventually when using standard bolts but I just replace them when they stretch.
I've tried many different ways to get the blade plate hub off ,except a jack hammer or air hammer ,I was using a fine thread on the puller bolt because of the mechanical advantage of tightening the bolt and getting high tension on the puller but I have striped too many bolts that way so I use a large coarse threaded bolt ,it just takes more effort to tighten or just a longer spanner so you get a greater perpendicular distance then less force is required.
