Removing MK1 ships also has an added side effect of effectively opening up the lower class weapon slots to other uses, like what was done with the turrets. Since effectively without MK1 ships, fighters would never have to mount anything lower than a class 7 gun, so anything below that can become specialized...could even rename the gun slots to things like Light Gun Mount, Standard Gun Mount, High Power Gun Mount (or something along those lines) for 8s, 9s, and 10s respectively, like how we have light and heavy fighter turrets now.