Hey all! I'm completely new to this hobby as of today, so go easy on me!

I've just got myself a Taigen Panther G, which came upgraded with metal parts; gearboxes, sprockets, idlers, tracks and barrel are metal

however the instructions say not to run it on grass because it will resist(?), but surely with all the metal upgrades it should be able to deal with grass, or dry mud at least?

any idea?
Thanks guys!