And I have these other two chain stitch machines, a Sewhandy 50 (given to me by the same enabler) and a Sew-Rite (given to me by my other enabler, er I mean, sister.
The 50 came with no thread tensioner parts at all, except the post. The disks came from a donor Touch & Sew, which has much smaller tension disks than black Singers. The Sew-Rite has a nice foot peddle and even has a stitch length control lever in the front; I also really like the diminutive sewing machine motor on it.