Developing Kodachrome II, 25 & 40 8mm movie film in Caffenol C

Thanks for getting back with the details. It's a pity you didn't get any usable images but at least you tried,

I just ran an age unknown, kodak selects Kodachrome 200 with your time of 6 min in caffenol c (5tsp coffee, .5 VC, 3.5 WS in 300ml water), and had bracketed at iso 50 and 25, but the results were a bit thin- I've got a 1975 expired K64 I'm going to try another bracket test on. is there anything I could have done differently?