A few months ago, I've made this MOC. The Rock Raiders can use this vehicle to transport energy crystals and mining equipment to locations what's not reachable for ground vehicles.
It's based on the original Rock Raiders 4980 Tunnel Transport. But it's not a replacement for the original one, but a extra air unit with more functionality;)
Landing pads adapts to the surface
Cabin and engines can be connected together
Crystal carrier
Bobcat
More photo's at Flickr:
Hope you like it :)