A big shout out to KTM-worship for doing this upgrade originally and also for his help and advice with doing my bike...also a big thanks to Weeksy for sending the caliper from the UK to me in Australia.
KTM-Worships caliper and mount came off an adventure and apparently his mount was a bolt on fit....mine was off a 2007 Super Enduro and required a little bit more work
Anyway on with the procedure...
I got started by removing the cap of the rear resevoir and draining all the old fluid out of it, undoing the brakes lines from the caliper and then removing the rear wheel so i could remove the caliper from the swingarm
As you can see they do look very similar side on but...

When comparing the caliper bracket you can see that it is quite a bit thinner than the factory one.

A quick trip to the local CNC machinist had a spacer fabricated for the princely sum of 2 slabs of beer


Back home and the new caliper and mount fitted like a dream...


Next step was to connect the lines to the new caliper, re fill the resevoir with fluid and start bleeding the brakes


The moment of truth...
I took the bike out for a spin and the damn thing was bloody hopeless , I knew it had to be air in the lines so after a good 15 mins of trying to bleed the system normally, my mate and i reverse bled the system and watched a huge air bubble pop up in the resevoir.... BINGO
I went for another ride this morning and it is ten fold better, it makes a massive difference to my confidence in traffic...although when hard on the front and rear picks it is easier to lock the rear now
So there you have it, brake upgrade done and dusted. If you have any questions post them here and I'll try to help the best I can.