from what I have gathered a QUALITY set of micrometers Starrett/Mitutoyo to .0001 and a QUALITY bore gauge.
the cost is high, but look what it would have saved...
http://www.sunnen.com/graphics/assets/documents/a8e673815bd8.pdf
http://www.practicalmachinist.com/vb/greatest-hits-links/best-micrometers-calipers-buy-110651/
the cost is high, but look what it would have saved...
http://www.sunnen.com/graphics/assets/documents/a8e673815bd8.pdf
http://www.practicalmachinist.com/vb/greatest-hits-links/best-micrometers-calipers-buy-110651/