I bought a Penn State Ind Barracuda chuck and a Shopsmith to 1x8 TPI adapter when I first started using the SS as a lathe. The chuck was good and I still use it on my Jet lathe. However, the adapter had a lot of play in the thread area which induced problems especially when turning bowls, hollow vessels, and other things that were not supported by the tail stock.
Mark V/510, Mark V/500 with parts for 510 upgrade, bandsaw, jointer, belt sander, DC3300 w/1 micron bag
Home designed and built CNC router, another CNC router
Way too much other stuff and not enough space