Thanks a lot guys.
I'll pass on the 4-jaw scroll and hold out for a 4-jaw independent in a little more manageable size.
Even a badly, BADLY worn 4-J indy is adjusted by YOU, so no NEED to "hold out".
Get one. Even a San Ou is better than naked air. Get a better one later.
I like to have pairs. My SCA's actual ARE "twins". One with jaws reversed. Pays off.
Bison-now-also-Toolmex is it? Is only a medium-grade. Value-for-money, but hardly magical. Bison seems spendy?
https://www.mscdirect.com/product/details/16042772
Top jaws extra. Backplate extra.
A Fuerda-Gator guy was ex-Bison. Hell-bent on beating them. His forged-steel 6-jaw says he's seriously competitive at that.
My LIGHTEST 6" is a Forged-steel Bison. The heaviest 6" is actually a Yuasa.
A "native" spindle back or backplate for SB 9 & 10 are VERY common on Cushman, Skinner, Horton, Union, "South Bend", and Atlas chucks, now-and-then also the right decent Pratt-Burnerd.
I did say "get one"? No such animal as a "useless" 4-J indy.
Some are just BETTER than others!