Last season I re-engined and put on a new prop. When the boat came out for anti-fouling I noticed the prop was going "pink". Testing the continuity on the anode circuit showed no continuity. Further investigation suggested that because the gearbox was the "Cone type", this was the reason for no continuity. Any ideas on how to overcome this other than by using what looks to be relatively Heath Robinson devices to hold carbon brushes on the shaft and wire those in?