Thank you all for your encouraging messages.
Yesterday I met a foot specialist. Quite young lady who is not a doctor. She checked my toes and ball of both feet. She did find several places where a slight pressure did hurt. She said that the situation is not very bad but the nerves between toes might be a problem. She also found an extremely sore place in the middle of the foot bottom. In both feet. The reason for that is my high plantar arches. I passed all tests that this specialist asked me to do. The strenght of my toes are ok etc.
The foot specialist gave several exercises that I can do at home. For one of those I need a half of a tennis ball that I squeese under my toes.
I am also puzzled about the "30 seconds diagnose" of the orthopedist last week. I don't have a baseline. Maybe my feel of the tuning fork has slways been poor. I am a tall 6 feet 4 inches (192 cm) guy with long legs.