Why are numbers sometimes one-off?
That's probably just a floating point error messing with how Factorio displays the number. The real number is what you expect it to be. Even though your speed module might say 999% it's still actually 1000%
Adds more configuration options to modules, and allows you to change how many tiers of each module there are. Huge credit to tocko73 for the original ModuleOverhaul. Infinity icon from Stockio on Flaticon.com
Mods introducing new content into the game.
That's probably just a floating point error messing with how Factorio displays the number. The real number is what you expect it to be. Even though your speed module might say 999% it's still actually 1000%