Damn it, my developing skills suck. I increased the temperature from 32°C to 33,5°C, overdeveloped the correctly exposed film by 1 minute and always kept the developing tank in 40°C warm water between the shaking intervals. But the negatives seem to be underdeveloped ?!? Don’t know what i’m doing wrong.
By the way: Our short-trip to Munich and Erding in Germany was great. I’m currently uploading the self-developed Horizon Munich film to my LomoHome, http://www.lomography.com/homes/t0m7