Not enuff room to drill the hole out to 16mm so I'm gonna drill a hole in from underneath and use a long range socket to hold the bolt in place til I've tightened it up!
Apethy has set in and I'm going belt and braces on the mofo.
I bought some m12 stainless steel thinking they wouldn't rust. Used em to replace captive nuts for holding me sump guard. Couldn't squeeze the rivnut tool. Hands not big enough. Thinking I was clever I used a trolley jack to push up the handle with the other handle wedged with wood against ma hippo. Jack lifted ma hippo via the rivnut tool untill the weight on the suspension reduced.