Hey Kevin
Been teaching leatherwork to the general public and artists for a decade or two or three. In my journey, neither my students nor I have found a gathering of projects specifically for machine stitching leather. However, if memory serves me, one book stands out...Leather Craft & Weaving published by Research & Education Association, with exploded diagrams, measurements, construction sequencing, dyeing and tips for making and use of dozens if not hundreds of objects. Whats great about it is that no shape in three dimensions appears to be ignored...but I am sure others are working on that. If there were any other guides as thorough as this one, I have yet to clap eyes on it. Perhaps others have found them on here. Here in the States, the book is $15.00. A true bargain, IMHO.
Mark