Chris,
Current practical experience is that the book is one of the worst pieces of technical writing for purpose I have come across.
In the book, I am pretty sure I recall a comment that the clock is not intended for timekeeping
The frames are a challenge, and I am waiting to discover if the inaccuracy in the template is going to be critical. Low probability or I would not have cut metal.
Some of the components are big (for small clock tooling) but I rather like the sacrificial wood faceplates as a technique and expect to have a go at the escape wheels this weekend.