I was trying to remove a slab of concrete about 36" W X 8' long, with one scarifier turned around to the back. I backed up to it but I couldn't get under it so I kept pressure against the cement and raised the blade, I did this a few times and when the front of the tractor stopped going into the air, the cement popped free from the ground. I tried to raise the blade to drive away, that's when I noticed the 3 point was allready up and the flat bar arms on the box blade were all bent and twisted. It was my fault for not driving home and getting the right attachment, but modifying things gives me something to do since I retired.
Scott