We finally got the rooster up yesterday and looks great.
We mounted it through a galvanized steel cap at the top of a 6m (48mm od) galvanized pole with two brackets like the ones used to mount a jockey wheel on a caravan, to the wall and a base support flange. On the end of the rooster shaft was welded two heavy duty washers. One at the end of the shaft and the other about 8 inches higher. These were ground on the external circumference to fit the ID of the pipe and secured by a galvanized screw to prevent it from turning. Then attached a stainless pulley and bracket, some rope and a flag, a rope securing windup lug and that was it.
What an expensive exercise. Steel is so dear but it looks great.
Regards Bryan Roebuck