Thanks shakey - really appreciate that. In fact, I have used one just once and that was a couple of years ago when I rebuilt a manhole in our front drive and had to grind off the edge of the cast iron cover (hardly the same as trying to do a bolt in a confined space though, although it may not come to that anyway)! What I did learn was that it sprays iron filings all over your drive, which you dont notice until it rains and they turn to rust, staining the drive beautifully! Luckily its only boring blacktop anyway but if it had been expensive block paving
