Have no idea what I'll use if for, if anything other than to prove it works. I'm addicted to chain stitch machines.
I've got a kenmore, Domestic, Standard (slim and stout) that are all "convertable" and then true chainstitchers, Singer 24, Wilcox & Gibbs (2 of them also) and a National.
I've come across some info that there may have been a chainstitch adapter for a Wheeler Wilson 9 too . . .