This modification is the map, not contraption.
No lags, stable FPS. If map doesn't load on first time, try to recompile it.
Mods -----> Underground Complex -----> Recompile
Also you can increase max compile time in settings.
File info
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that cool map i hope it not fake one like other one bc it was small map and sucks
that cool map i hope it not fake one like other one bc it was small map and sucks