Unless you plan on using only the new mech parts, be careful, as this makes the actual frame of the mech taller as it says on the front. However not all mech mods are compatible with this new frame and it makes some mech parts...how I say, bad? For example the Dreadnought's (a warhammer 40k mech mod) legs are basically invisable, and not at all compatible with this mod...the rest of the parts are ok though so use other legs that fit. And I doubt this mod is getting an update anytime soon and the other mech mods probably won't release patches but I digress...
Oh and uninstalling this mod probably won't fix it so backup your characters and universe and do a clean install, if that doesn't work than try deleting the universe and characters (hope you still backed them up for later use) and see then.