Before you get too carried away with operating at the weights and CG that the Restricted category permit, you want to ensure that you understand what the Restricted category offers in the way of safety, and margin.
The answer to that is not much at all. Note that they offer little if any information on performance.
Remember the Wip 2000 gross weight ups the stall speed to 53 mph. The Restricted category weight will take it up even more. So, with the CG at the Restricted category forward limit, the stall speed could be quite high.
Further, load factors really aren't considered in Restricted category operations like they are in normal category. You may be able to carry the weight, but have a +-1 G load factor limit guarantee.
These airplanes were operated as sprayers, and I operated for many years in this category, but it's important to understand the parameters you are dealing with, and they very definitely are not the same as for a normal category aircraft.
Mike V