Work in the early part of 1983 was mainly confined to smaller jobs such as casting various brasses and overhaul of the various parts of the fantail drivetrain and mechanism for controlling the Patent sails . The mill was generally made as safe as possible inside in preparation for scheduled visits , including one from the Wind and Watermill Section of the Society for the Protection of Ancient Buildings . Other work included the overhaul of the final drive to the 4 feet 7 inches ( 1 @.@ 40 m ) stones , including dismantling the stone nut and replacement of three cogs in beech .