We found the original rules unrealistic and unbalancing, these are not perfect but they more closely reflect the impact and development of advanced weapons during the war. Feel free to add or subtract any development you want, as long as everyone agrees and knows in advance. These rules were developed to be used with the World War II Expansions by Gamer's Paradise, if you do not have these products (which are great by the way), just ignore any the fighter bombers third role and any references to escort fighters. Fighter Bombers COMBAT- FB's basically preform combat in 3 modes.