This is probably going to sound nuts
Only sound so, but you are correct. Remember, my riddles look nutty but they have abysmal hidden meaning. :):):
This self made device is steps into the cabin of a digger.
difficult to tell how high up off the ground the door
No, it isn`t difficult. You can the see bottom part of the door with one hinge on the left.
As for your riddle, I can`t see anything.