LOL, I hate to drill out a bigger hole but....They make kits for that. It is a round plug of trex and a plug type bit that extracts the amount the plug will be pounded into.
LOL, I hate to drill out a bigger hole but....
WINNER WINNER CHICKEN DINNER!!!!!I'm thinking a roofing nail held in a vice grip with the flat head heated with a torch and smooth it out. I have not tried this, but practice on a scrap.