@Nertea Hi! First of all: thank you for your mods, they're amazing, I play with almost everyone. Also apologize for my English, it's not my native language.
I found the mistake of breaking the economy. When mod CryoTanks is combined with mod B9 partswitch. For example two fuel tanks: MK3(longfuselage)LF100 and MK3(longfuselage)LFO100.
In stock game MK3(longfuselage)LF100 costs 17200 credits, MK3(longfuselage)LFO100 costs 10000 credits. This is understandable: the cost of LF is higher than the combination of LFO. But if you switch LFO100 tank to liquid fuel, its cost with equal amount of fuel becomes less than that of a specialized LF tank. Thus, purchase of some tanks with liquid fuel, with this mod loses all sense. This also happens with a shortened version of these tanks and with others. The mk2 tanks, for example, are initially the same in cost and they are fine.
I have a suggestion: it is possible to make the cost of a universal (LFO) tank more expensive than a specialized LF tank. At equal cost of fuel, it will be less profitable to store liquid fuel in a universal tank. Or disable the switch to liquid fuel where there is a specialized equivalent tank.
If I've written incomprehensible - tell me about it, I'll try to supplement it