Hi everone Finally it's off.Here is how i did it. I put the blade on loosely over the blade holder so a 2 arm puller can fit under it. I then applier a lot of tension and sprayed the hob with "bolt buster" Still it wouldn't budge and and the puller flew off and injured my finger. I tried again the next day (I wore gloves and protection this time) It still wouldn't budge.I made up a shield to protect the crankcase and oil seal. I then applied LPG heat with the tension applied to the hob. There was a loud pop and it moved a bit. I then reapplied tension and more heat to the hob and it popped off a bit more. After 3 goes it was off. Unfortunately the hob with the blade adapter is ben beyhond repair from my earlier attempts with the 3 jaw puller.I now have to source a replacement.