Just bought a pair of FCS adjusters (as they were too cheap to ignore) to fit to my RO’s.
I’ve fitted new rotors, pads and will be giving the brakes a full bleed ahead of going to Whistler next week.
Question is, do I need to do anything in particular when fitted with regard to bleeding? Fully in, fully out?
Ta

Usually with these types of systems you need to bleed them so that you get the minimum volume of fluid in the system, so in this case it would be at the fully in (shortest stroke) setting.

The interior kind of resembles the “v-brake modulators” of yore (spring-backed extra chamber):

l.e. You can try fiddling with the adjuster while you have the syringe connected to the reservoir in order to dislodge any air bubbles in it, just make sure it is in the fully in position when you disconnect the syringe and screw in the reservoir cap.