Thanks to Greg and Ret, done all done ..... eight hours later ....

I think I could do it in two hours now I know the right steps.
Step one ...
grind the back off the broken lug almost flat to the support. ........ I drilled through from the inside for hours and used many drill bits. The drill spun out of my hands a few times

Ouch! It took ages stepping up through the sizes and burning bits. I then went to Bunnings and purchased three very expensive dtill bits in high tensile. With a bit of cut compound on the tip, this worked well. After drilling, I found out the thread on the new spring bolt was not long enough

So then I ground the back of the old Lug as per step one ...
Step two, drill the hole for the bolt to go through. The biggest drill bit I purchased was a 1/2" The thread needs a slightly bigger hole.
Then it is easy from there to adjust the spring tension with a long Hex Key and a 7/8 thin spanner. This is a great method as you don't need a spring tool and this avoids looking fingers.
I believe FE-FC original lugs are easier to remove.
Steve
Without nasco broom handle .....
