I use an Adler 205 saddle sewing machine for my heavy stuff and a juki 1541 and a Pfaff 1591 for the lighter weight things and the small items that are hard to get to I hand stich
I like my shoulder strap to be wide enough to tote a couple or more asseccories where quickly available without having to fumble around in the bag looking for what's needed. The above photo works well! Click on the photos herein and they will enlarge!