Yes, The manuals for many of the lathe have errors. This may be part of PM's reason for rewriting and posting their versions. I think I used the PM online manual when putting the speed sheet for the 1340/1236T together. Did you check the spread sheet to see if it agreed with your machine's performance? I think we discussed this at one point. I know your sketch of the saddle gears was a big help and very insightful.
Dave
Dave