I was able to put a damaged piece of pex in the vise (with fittings attached) and release the fitting with the orange tool without much trouble. However, I could not do it no matter how hard I tried when the damaged line was in the ground. By further explanation, I had cut out the bad section...
Is there a real tool to release a Sharkbite connector from the tubing? I made one for 1/2" pipe that works OK, but when I needed to release a 3/4 connector, the orange U shaped "tool" needed more pressure than I could administer. I am probably overlooking the obvious.
I have also demolished enough concrete also, and agree with Firebrick43. I made my own chairs out of scrap 3 or 4 inch PVC pipe. I could then walk around on the suspended rebar.
When I was a teenager I took apart a bowling alley that was given to me for free. I used the pine which most of the alley was made of to build a garage. Lots of labor to build, I even did a hip roof using the materials. This was over 60 years ago, it is still standing.
I did a larger house with a good size excavator. It was a bit stubborn until I destroyed the stairwell. All in all took less than an hour. Piece of cake.