The bomb drop sounds good but the way my bomb bay is built I don't have room for that many bombs. What I use is a pull rod from a servo next to the bomb bay mounted in the wing. The bombs have a hole in them and as the rod pulls back each bomb drops in sequence. Pairs would look better and I'm thinking of modifying my system to have two rods. The pull rod system is crude but it works.
Don't stop coming up with ideas.... Mitch