The firefly is cheaper, you would have to increase its cost to decrease its population I think.
I do however find it ironic considering my prior arguments regarding AT capability and high population costs surrounding them. There is a difference between anti tank equipment and tank hunters. I guess that's part of the problem with Marder III balancing, it fulfills a role as a defensive AT weapon, but has speed.
Cromwells fail, mine had 4 direct hits on a grenadier shreck squad and didn't kill the remaining two guys. Worst anti infantry tank ever. Don't say l2p, because I can hardly effect damage on infantry
. Two cromwells firing at once on shreck squads SHOULD kill them, not both die.