ONEHARDHEAD
Member
I believe there are two grades of instruments from Starett, one less expensive than the other.
Good point. Show me your credentials.
Another thing I have found helpful is compare measurements with a legal part. What is the difference in the measurement ? Not perfection by any means but certainly a good indicator of the difference.
That may not always be a good indicator, as clone engines have variances between batches. This would be the case also with differences between aftermarket parts.