World Dangerous Bulldozer Operator Skill - Biggest Heavy Equipment Machines Working

These things are so powerful. The amount of torque is unbelievable. I seen bulldozer tracks going up cliffs I couldn't believe. Never knew they were this powerful as well. When I see these huge machines I think of the benefits they bring, eg road-ways.  Watching ( again) in July 2021. Those two Dozers ( 1 operator, 2 dozers) are those 7's They don't look big enough to be 8's or even 9's. I know for a fact Caterpillar Tractor offered what they then called a DD9G outfitted the very same way except they had ROP Steel re-enforced. My Grandfather had purchased them in 68' here in Phoenix for his earthmoving and tillage business. I was 8 years old
when he let me drive around his home farm/ shop. I felt like I could move the entire world at the time. CAT  also offered the "big daddy" of all Cats at the time; it was 2 D9G's side by side with one big ass DOZER blade and as well only required one operator. Cool video. Thanks for it.