Multiplicative speed modules

Yield and power efficiency modules are multiplicative, speeds are additive, because of that even in vanilla there is no reason to use 4 speed modules because with 3 speeds refinery has 430% speed and with 4 has 530%, so 4th speeds make refinery only 530/430= 1,23 times faster, when yield module gives 19% more ingots, so 4th speed modules gives 23%-19%=4% more ingots then yield ,but consume 23% more ore. it may sound not spectacular disbalance, but difference is much bigger when take into account modded speeds with bigger numbers. result is that perfect setup of upgrades is 1 or 2 speeds modules and rest are yields. if we would have possibility to make speeds modules multiplicative it will gives players possibility of better adjustment their refineries to their needs we already tried make speeds multiplicative but they were turning off after server restart, also right after building them they were not working (refinery saw them as mounted upgrade) and player has to hack them (they were his own but player has to grind them down below hack lane and then weld back)

i didnt want spam with too many calculations, but if you need them to understand how important multiplicative modules are for modded speeds modules i can do it

if we would have possibility to make speeds multiplicative we could balance our servers much more what is important for us and players playing there