Just when you think you are getting somewhere..... managed to drill out the centre of the bolt wedged a size 35 torx into the hole, about 5 mm deep, put the wrench on, good purchase.... happy days
no ping! torx bit has snapped off in the centre of the bolt, now I got a hardened bit wedged in an already rounded out slot, I think it's fubar'd
time to sit and think!!!!!