I would try coarse rubber strips on the wheels and lots of weight to make it grip but the grade is still going to make a huge difference... what is your incline currently?
i am gonn have to measure it , i suppose its ok to fit rubber strips in all wheels ? that will not impact on speed is it ??
Got a mint 4051 today , really pleased now i am off to get some cargo wagons and job done !!!!
"Done"?
Probably not , for this month anyways