RKtech kit now comes with the hard rollers. I know Kelsey has been working on his secondary kit for years now. I am sure his stuff will work in the mountains. He puts a lot of miles on testing each year.
I just put a rktek secondary setup in my m1000. For the first time since I bought my sled it can keep rpms all the way up the hill. no more sluggish backshift. also when I was done three long pulls I could hold my hand on my secondary with out burning it.