A fork of Factorissimo 2 focused on improving performance by implementing several 1.1 features. Can improve performance by 10X or higher. Also fixes several bugs from the original version.
Using the "Pipes and Belts changes" option of Krastorio 2 changes the length of the underground pipes and belts - however if you use an underground pipe connected to a factory building (internally or externally), then the underground length is reset to the default of 10 for that connection, rather than the extended value of 20.
