Thank you, oh thank you idols of mine. ;) I have put a screwdriver between the body and a knob and it came right off. Funny thing, I tried pulling it with my bare hand to the point i heard some squealing sound, even tried it with pliers (put a cotton rag round the knob) and no luck. And then i put the screwdriver between, gave it a pop, and voila! :) Thanks fellas. Next time you are in Croatia, beers are on me. ;) Never did took the knob off before. Now I will know.