Challenger Tractor Pack By Stevie for LS19 by FS 2017 mods · December 17, 2018 Challenger Tractor Pack By Stevie for LS19 Many thanks to EC for your very kind donation sir. Regards Stevie. The Case Module Express cotton harvester has been updated to the V1.21 base game model on its original link. Here’s the Challenger tractors as well. Unzip this pack and place the mod zips inside into your mods folder. Have fun with them.