Finally managed to catch a Railgrinder in action, even though this is the 'mini' version, it's still impressive. Note the camera pointed down at the track, the fire extinguishers on the sides and the bucket on the front porch. Sure looks like a re-worked GE 80T.
Only a few weeks ago these rails were bieng put in, or more correctly dragged in:
http://tinyurl.com/yqynut