Soviet ZIS-3 Guns for Flames of War

Productivity has slowed a bit in March but I am still working towards my goals.  The next unit for my MW Soviets is done - ZIS-3 76mm battery.  These are the old Battlefront metal models with the resin bases.  The bases are just OK but everyone seems to like the dead cow.  I have heard these are a must have for the MW Soviets but just looking at the numbers I'm not sure.  I can't wait to experiment and see if they are worth taking.