Weighing the Ercoupe

Couldn't find anything definitive in the search. Is there a document or manual or write up on the procedure of how to weigh an Ercoupe? I am assuming level ground, no fuel, full oil. Nothing else in the cockpit either. Then either one scale per wheel or one scale on one wheel and blocks under the other two raising it level it with the scale.

Meanwhile the annual's done, she has a flat windscreen now and the rudder pedals have been removed. New compass will get swung in the very near future once the glaciers up here in north country recede... 

Mac