I with my sons basicly play the game as it is, although we have about 6 house rules. I don't like to modify things to much as the rules are very good so why fix something if it is not broken. Perry one of the house rules we have is for upper wing Lewis guns, you can fire them for 3 turns, then you have to reload, this is done with one jamed counters, but only for the Lewis gun all other guns can fire.