You know, I think you are right.
They did utilise a lot of “found objects” during the production, and I think I have identified the source of the Bacta Tank.It looks like a Black & Decker Spacemaster.
In just three minutes, we will all be enjoying hot jedi toasties!
Yay!
If my experience with toaster ovens means anything, Han, Leia and Threepio are the ones at the highest risk of being toasted. Luke will come out vaguely warm.
Perhaps even… Luke warm.