I bought and used a Craftsman screw gun that has impact on it just for this job on mine. Made the job a breeze! Looks like there may be enough cross left in there to get a couple more with the right tool.I got grab it’s and a screw extractor set but nothing is working what are the chance of me tapping new threads and drill out?
Yes, you can drill out the head of each screw, then remove the cover, and grab the remaining tip with small vice grips and unscrew them. I suggest left-hand drill bits (O'Reilly has an inexpensive Cobalt bit extractor drill set with left-hand bits). You may need to buy a right-angle drill to get in there.