wwaswas – ah. Yes, you could have a good point there.
Clearly i’m an idiot – i read “Hope Front IS to Post Mount Adaptor” and read it to mean fork is IS and caliper is post mount, but then reading the description again and its “to mount a 51mm international standard caliper (i.e. Hope, Formula, etc) to a 74mm post mount fork with a 20mm increase in disc size.
Doh.
As for the Jonathan’s link – i think that’s just brought me to my senses!
Yes, in theory one of those should work and just looked at the superstar 180 adapter and thought “it looks just like the shimano 203” adapter.
Then checked again and seen the very small ‘R’ that’s on it!
That’s where i’ve been going wrong – that explains why nothing lines up.
I am clearly a fool – i’ll order a front 180 adapter and that should sort it out.
Thanks both!