Underrepresented you say? Well, Sklar, the creator of this creation, helped along the lack of Blacktron 2 in this NBT infested time. He calls his creation Blacktron M.E.L. for Mobile Exploration Lab. Strange name. Ah well.
Name aside, I find this a very interesting creation. The wheel Assembly is definitely different, and the use of the Power Miners wheel/drill thingy on the back is a nice touch.
Look here for more pictures: http://www.flickr.com/photos/sklar/3710462832/