Suggestion: Mixed Battery gun configuration
Detail:
It has been a historic fact that the F6F-5 Had a mixed battery of four 12.7mm machine guns and two 20mm cannons on the inner wings. While only some were manufactured with all six as 12.7mm. I have attached a snap shot from the Naval Historic Center that details this along with some VERY helpful flight data information which would aid in a more improved flight model. Classname could be F6F-5mb
PM me if you want the whole article. I have to e-mail due to forum upload limitations.