I have a 10x12 wood Tuff shed from Home Depot that I bought a few years ago. It was built on a slight incline and the shed was put on concrete blocks which are aligned around the perimeter in 6 places and at least one location in the middle. The blocks have sunk into the ground causing the door to not open fully. I need to raise the shed up enought to get more blocks underneath. Has anyone done this? Any tips would be appreciated. I was thinking about jacking up the back putting more blocks in the middle first so I could easily tip the shed back to put the blocks on the uphill side then go back to jack up the downhill side to put the blocks in the back. Also the shed has the galvanized steel frame that sets on the blocks.