But using a shovel gives it that "personal" touch that you just can't get from a machine!
On the other hand, one reason I like making e-Sword modules from bad scans is that it forces me to read the book as I correct the OCR mistakes. I actually learn a lot doing it that way, and I can guarantee a 99% typo-free module, even though it takes some time (I've got about 7 different books I'm doing this to right now...and there's the College Press set that I've been working on for quite some time as well).
I also understand about the manual part of it.. I've done articles to pass among friends and as you say, by reading through and correcting things, manually adding any tool tips that were not correctly converted, typos, whatever.. It is very worthwhile and when you get done, you have not only made something that someone can benefit from, you have also benefited from it..
The creation, the effort, is an act of giving.. in the act of giving, the one that gives gets a lot out of it... This is Gods way..