I also got Fizzy to square up my tool block on his precision grinder ,it was a few though out of from being square all round . That also made a big difference to the quality of the cuts & finish on precision made indexable tungsten cuttersYes, done that previously, scraping and stoning done. Any doming can really throw things off. Need to make sleeve to fit between the new bolt and the bore of the tool post next, surely will help location, but I kind of like the omni-adjustabilty of my tool post being infinitely adjustable. Should have provided a mug for scale, but my bolts is 5 plus inches long, 265 thous diameter, not an hours work for me..

oops wrong thread