When the ST185 twin pot and SW20 22V brakes went on, it left the car with a rather soft, lackluster pedal feel due to the now undersized master cylinder.
I rectified this by purchasing a 1″ Hilux master cylinder.

Installing the Hilux master cylinder was a breeze, about 15-20mins work tops.

It just needs a small tweak to the brake lines due to the lines connecting to the master horizontally, while the stock one is more 45 degrees in from the top. (shown below)

There is now more space between the tank on the master cylinder and my strut brace, so it’s actually easier to get a bottle of fluid in there to top it up.