did calculations. biggest exploit i ever encountered. upgrade chain MIL -> INF-> MOT-> MECH will save you 40% of IC/D. sooo. if i build 5 regular MECH, from scratch. or i build 7 MECH the upgrade way. same cost. almost the same for every upgrade. MIL -> INF about 35% save. CAV -> LARM/ARM/HARM 30-35%. thats like, alot. dont you guys think that it should be changed?