Yes stainless on the way. I have a fairly local shop that sells stainless tubes but I want to test this out before I make the drive. Yes the tin walled deformed, (0.0165″) Pretty sure I have .032 and .065 or .092 on the way. The .0165 is just a bit less rigid that standard emt silky smooth exterior but too weak walled.
Emt I usually get from the hardware store.