Hi, I'm currently on vacation in Edmonton and soon Vancouver shooting 4x5. I left pretty quickly and though I'd figure how to process my film later... Now I'm stuck with a growing stack of exposed mags I'd like to reload. I'm about to go get some D-76 I plan to dilute to working solution directly from the powder as I need it, but would rather not carry plastic trays in my backpack (the big trekker's kind). Has anyone tried processing film in those disposable aluminum trays you use to cook things in the oven? I know I'll definitely need to cover the trays so I don't scratch my film, but they would fold very nicely! Will the aluminum react with D-76? Ideas, thoughts, experiences all very welcome!