G'day Norm,
Many of the extra uses would not have required dismounting of the motor, but rather the use of a long drive belt to the gear to be powered. Much like the mid mount flat belt PTO pulleys found on older Fordson tractors, which were used for sawbenches in particular.
Post hole borers [for drilling the wire holes in timber fence posts] were often powered by a flexible shaft in an outer sheath/casing, attached direct to the engine PTO.
One of the Cobram rural fencing contractors powered his with a horizontal shaft Villiers mounted on a rusty old wheelbarrow frame. Weird looking setup, but it worked very well indeed, and Reub used it for many years.
