Just been to see a M113K block that I had planned on keeping as a spare for my E55, the guy selling had sent me loads of pictures of bores that looked fine after apparently doing 90k, but on closer inspection I found a few vertical lines that I could positively feel with my finger nails, so I turned the sale down. Did I do the right thing, bearing in mind these are alusil? Would be interested in peoples thoughts. Matt.