Ah, I'm used to hope brakes so assumed the fittings I have already could simply be swapped over to the new hose. Is this not the case with formula fittings?
I used to run Formula calipers with Hope C2 levers and just adjusted everything to suit. I also ran the same levers with Grimeca twin pots and their XT version (1st gen XT twin pots are from Grimeca). An afternoon spent with olives and fittings and tea.