Excavator driver shows skills in difficult situation

Lift it an get idler through laying chain over the track frame holding the chains up, get the chain over two top rollers. Pull tracks back lifting track frame as you go leaving it off on front idler, get chain into the drive sprocket make sure still on top rollers and under close as you can then track backward and it will roll onto the idler. Bang done. I did a 50t by myself.  It would have been easier if he put it on the sprocket first then the idler.  Idler through first so track is on inside of track frame, this keeps loop open, then mount onto sprocket and take up slack, then back to idler by just tracking in a circle, can be done in under two minutes!  wouldve been 10 times easier to just onbolt the track, flatten it out and drive onto it like you would normally change a track.