I am wondering if a regular push spreader could be modified to spread compost. Suppose you cut a circular hole about 2 inches in diameter in place of the usual center hole. Would that be big enough to pass a well-screened compost? Could you replace the big hole with a plate with the usual hole size held in with three screws--when you needed to use the spreader for ordinary fertilizer?
Same idea for a ride-on spreader.