When you are using safestrap you auto save your current system and when you reverse you safestrap it will revert back to your original setup. If you need more help just let me know and I can figure out the walk thnrough. Will look for a stock_stock in a bit
My D3 was on XT883 Chinese ROM to use T-Mobile SIM card, but it sucked so I went back to stock using this method. It had no stock recovery at the time, so this was my best bet. Later, I just flashed the XT883 radio.img and replaced my build.prop to get GSM functionality back. This, of course, required a carrier unlocked D3 ;-)