Hello, saw your posting, but, did not see who you are directing your request to.
I sell the line of Tippmann leather stitching machines, including the Boss. This machine will sew leather, bioplasticnylon or nylon up to 3/4 inch in thickness. It only weighs 45 pounds and is very portable. It will ship by UPS anywhere in the US or overseas. It will use thread sizes 69 (the finest) up to 504 (the heaviest).
Most person tend to use thead size 277 for most work.
I have an Aerostitch that I use to sew harness and other things, and use only size 277, which does produce a neat stitch.
A new Boss lists for $1440.00 plus shipping.
However, I would suggest you contact me direct, by e-mail for further information.
ron
rosaddlery@mail.fwi.com