David Millard using a SDS plus drill with auger drill bit, to drill holes to screw or bolt down the vertical pulleys (for signal wire/chain) or vertical cranks (for point rodding).

David Millard using a SDS plus drill with auger drill bit, to drill holes to screw or bolt down the vertical pulleys (for signal wire/chain) or vertical cranks (for point rodding).

Photo by Graham Peacock