Stainless Steel Tanks and Reels

Got these the other day for a massive price of $1.35. Two tanks (a double and a single reel tank), and two reels, with one that is brand new. At least some photography gear is still cheap…
I bought these for when I start my colour developing. Developing C41 of slide film is much more temperature dependant than B&W film, so the conductivity of steel tanks should help me maintain a more accurate temperature. All I need to do now is figure out how to load them, might have to sacrifice a roll to practice =/