Sadly I encounterd my first obstacle. The BB is stuck like hell so I will first have to take the frame to the framebuilder I know to have it drilled out.
Have you tried the old trusted "soaked in WD40 for a couple of days and put your BB tool in a vice so you can use the frame for leverage" method? Drilling is such a last resort method
thanks, @Poetic
Sadly I encounterd my first obstacle. The BB is stuck like hell so I will first have to take the frame to the framebuilder I know to have it drilled out.