Thank you for the answer, it look like I need some dowels to do that job and I will have to get first the tools. I am still not very clear about how this could have happened. Nothing ist stuck on the maschine, juste the dow movement is inversed. If I could send you the rep manual and you would have a look at it, you might figure something additional out. c_ganzoni AT yahoo DOT com.
Christoph Ganzoni, March 2014