Hello; Excavators are my favorite construction machines, and the operator's skills are extremely impressive. Just amazed at what these versatile machines can do. Many hours in an excavator, but even with the winch system hooked up on the last one, No way would I do it lol. Can clearly see the winch cable from 10:50 forward. Crazy machines! I can't believe the spider excavator can crawl up those steep hills,I've been running equipment for 30 years and I can't understand how. When you pick up a load and the front of the loading vehicle tilts itself up in the air like that. If you decide to go with it please write out your will before you go. I don't get this one. Why doesn't it slip and slide down that nearly sheer face? I see those tracks, but it still doesn't seem possible that even those could have sufficient traction to overcome the force of gravity on that machine. Maybe those tracks have, like hooks in them or something to really grab onto that kind of rock face?