Not quite sure about the info contradicting things. If you look on page 12 of the manual in the bottom right corner there is a graph showing how to apply a correction factor for load if the hardness of a shaft on which the rollers are running is less than HRC60. It may be that the sort of...
The Doug Kelly book may be available from Camden Miniature Steam Services in the UK Their website is camdenmin.co.uk and the book comes up if you do a search for Doug Kelley. Best regards,
Trevor
I have the Diamond tool holder from Eccentric Engineering and it is absolutely brilliant with either HSS or Crobalt. Yes postage is expensive now - I often buy things from the USA or UK and sometimes the postage costs more than the item.