so here is an update

i had to drill and re-tap the working hole that had the remains of a bolt in it. It was a long process because i didn't want to drill into the axle plate.

Purchased 2 bolts to use to "walk" the drum off.
If anyone is interested:
M8-1.25 metric. Standard 8mm thread.
I got 60mm long bolts threaded all the way.
The original screw i pulled was 15mm long.

The drum started to move, even though i could hear the shoes moving, it came forward so far (10-15mm) then i couldn't move it anymore. Looked in the hole at the back and i could see the star adjuster further away from the backing plate.

So there must be a lip. Hold the star's locking lever out of the way and try to turn it. No movement either way.
I did tap the drum back into place before trying.

Tried for about an hour trying to move the star. Nothing.

Starting to get annoyed with it.

So any ideas on how to get it off?

I am considering an angle grinder and cut the drum face off.
If i go down the angle grinder route, what should i avoid?
I have replacement drums, spring kit, wheel cylinders and shoes. I need to avoid all parts of the hand brake and star.

The drum hasn't been off for at least 60,000kms.

Thanks.