LOL!!! I've got their HI-Rail stuff. It's crap! UNLESS you are going to just use them on straight track. Curves? Forget it. wont follow curves at all. I'll wait for a real modder (JWeezy) to make them.
I know people like Adam in Wood Medow Farms he and many have been Testing that Hi Rail Stuff in the Wood Medow Farms group Patreon since their Wood Medow Farms stuff is still under testing
u know hi rail vehichles were used for things like maintanence mind u so yea on such things like straight tracks that is possible to use on straight track but only for maintanence purposes