So here's the problem. We have an area of decking which was covered in astro turf (not by us) Mrs Ted (bless her cotton socks) decided that we needed to remove the astro turf. Unfortunately parts of the ribbed decking underneath have gone soft or in places, rotten. No problem, replace the rotten lengths with new, and turn the other ones over as the reverse side is also grooved and in reasonable order. Until I try to remove the screws. They are full of crud, tight and for the most part impossible to remove. Tried drilling the heads off but have blunted two (cheap) bits. It has now taken me all evening, and all my little stamina to replace two boards. So there's the problem. I'm thinking of looking for a small circular hole saw if such a thing exists and drilling around the screw head. The screw can then be removed with pliers, I can reverse the board, put new screws in different places and fill the holes. Or is there a better way of doing this? All suggestions gratefully received.