When I look at my Cub identification plate it says it is an FCub, serial number 37281. However when I get on line to order parts I am constantly wondering if I am ordering the right part cause I never see F Cub listed they will say fits A, B, C, H but I never see F series listed. Am I going blind was there an F Cub series? If so how do you match the parts or where can you get F Cub parts?