4MR Cat 18M3 Conversion v1.0.0.0

This is a conversion of 4MR's CAT 18M3 from FS19. This isn't a perfect mod, but it works better than previous conversions of this grader, in that it truly works now. Terrafarm can be used with it, or you can use it without. The tires sink a bit, but this has come a long way. It's a grader I've been looking at for sometime, so I hope you like it.