Hi Bernd,
Sorry! I'm just seeing this now, as i am no longer very active on LH. Well, not active at all. There are too many posters here driving people away with their arrogance. I want to enjoy this hobby, not defend my preferences...

So, about the 124: i have no idea how to do what you ask. I hired Greg Metz from STS to do the restoration of the 'table, as i quickly realized that the 'table was too valuable to risk me wrecking it!
I do think there are some youtube videos about some aspects of 124 restoration, but i don't know how much i trust them!
Good luck. Sorry i'm not more help.