Hi, people.
After a long pause, I would like to kind of update this topic. I took the radio to a local radio club, but they couldn't do it. I then decided to try and align the reception a bit by myself. I first replaced the CF, just to see if it would make a difference. I then made a small plastic tool to use for turning the snugs. I then confirmed that T1, T3 and T4 influence the FM signal, T2 and T5 (both red) affect the AM sound.
The blue T4 increases the volume the most and there is very small range within which it has that effect and no crackling or distortion. T3 impacts only...