Mostly finished with a hand crank for my Grizzly G9972Z lathe. I used the simple design from George Thomas and Model Engineer Workshop.
Points to consider:
A 10 degree taper is self releasing. No need for a pin in the expander plug.
No need for a dog point screw. I've had no problems getting the expander plug to release.
Stainless steel cuts well with CCMT inserts, but leaves a long, stringy swarf. Think of it as miniature general purpose barbed tape obstacle. I have the cuts to prove it (yes, my blood is red). Do not try to pull it off a leadscrew, use metal snips to cut it off.
SS has an issue with work hardening. Nothing like snapping small mills and drills when you hit an area.
Bullet point DeWalt drill worked well in SS.