Hi Neil, as chance would have it I've just been looking at an old Model Boats magazine from June 1998 which has the second part Ivor Warnes review of the model. It covers electronics installation sail winch and sailing, so should be just what you need. If you pm me your email address I can scan it this evening and send it on.
I don't have the issue before, I must have passed it on to someone else.
Regards, Charlie.