Originally Posted by DWFII
To stitch the outsole, a "square" awl...always. I am not surprise that your maker friend didn't want to do 16 spi with a round or "sewing" awl. Needs
a square awl, nothing less will do.
Sole (in this case a double sole) stitched with a square awl at 10 stitches/inch.
In central Europe, where everything is stitched with a round awl, stitch length never seems
to go below 1/2 'Paris Point' (3.3 mm) which works out as 7 1/2 spi.