Re-upholstering seats

I reskinned the rear seat back (with a stock skin from a wreck) and could never get the corners stuffed correctly. After I did them, I looked up the tricks and found that you install it over the top corners inside out and roll it over the rest of the seat like a sock, that way you get the corners nice and square. Heat is your friend as a pliable cover is much easier to work. A local shop charged me $175 a seat to restore them to stock looking with original looking material that is much softer but the corners are not as round. My original buns were STALE, like powder falling every day stale. They felt like the stuff florists use to make flower arrangements with, that gray foam you can stuck your finger into and it leaves a hole.