As for time frame, it has shifted from 1830s to the 1790s, and now includes information on die steel alloys, circulation of foreign coins, reason Mint remained in Philadelphia, along with some later materials for power production, equipment and processes - this includes the most complete description of the large screw press used to strike proof and pattern coins until 1894.
Finally settled on a title "More Mine to Mint" -- not very creative but fits with the first book title. Haven't picked a cover illustration.