I have a Viking 10 30 (Zig Zag only, no cams) I hunted it down specifically because with the 5:1 reduction gearing and not extra mechanisms for the cams, this thing is a tiny little beast. I have done flat felled seams on bison hide with it. I used it for hemming and sewing the leather for body armor in my medieval group. Now that I have the Victorian collection, it sits alone in a plastic crate as trade bait (along with manual and extension table...) hehe