I am in the process of putting new seats in the 911.
After a visit to the welder to lower the seat rails, I decided to remove all the thick hard factory floor insulation/ sound deadining stuff on the floor before repainting. On a whim, I decided to try a Fein Multimaster with the scraping blade. If any one is thinking about removing their floor insulation for weight savings, I suggest you look into getting one of these things. It takes the stuff right off. It is still no fun, but I wasnt getting very far with the hand scraper.
JoeF