I suggest you use a text editor rather than Corsix to change the data\ai\rules_unit_purchase.ai file. Notepad ++ is a good text editor IMO. I can't work with Corsix very well at all.-Too many goodies are a distraction.
soviets_purchase_limits = {
[BP_GetID(SBP.SOVIET.MORTAR)] = 1,
[BP_GetID(SBP.SOVIET.SHARP)] = 2,
[BP_GetID(SBP.SOVIET.T90)] = 2,
[BP_GetID(SBP.SOVIET.T70)] = 2,
[BP_GetID(SBP.SOVIET.IS2)] = 1,
[BP_GetID(SBP.SOVIET.CONSCRIPT)] = 5,
[BP_GetID(SBP.SOVIET.REGULARS)] = 3,
[BP_GetID(SBP.SOVIET.SAPPER)] = 4,
[BP_GetID(SBP.SOVIET.GUARDS)] = 3,
[BP_GetID(SBP.SOVIET.PTRD)] = 2,
[BP_GetID(SBP.SOVIET.ZIS3)] = 2,
[BP_GetID(SBP.SOVIET.PARTISANS)] = 3,
[BP_GetID(SBP.SOVIET.ISU152)] = 1,
[BP_GetID(SBP.SOVIET.KV2)] = 1,
[BP_GetID(SBP.SOVIET.KATYUSHA)] = 2,
}
[BP_GetID(SBP.SOVIET.CONSCRIPT)] = 5, change the value.