Still, after numerous iterations due to discovering rear bulkhead interferences issues and instrument sizing verifications in the panel layout program, the panel layout using Xpanelsoftware.com, is finally DONE. A significant shuffle occured due to radio length problems at the top of the panel. The GRT units are only 4.75" deep, so moving them to the top solved a lot of issues. Van's circuit breakers are physically a lot bigger than other styles, so had to respace them in the panel.