thanks for the link and the transletion

, ill try to modifay the design when ill have time ..
btw , are the maze i built is too restrictive ? i think i should change the small channles from 1mm to 2mm ..
@rotor , i think the 1mm chan is the only dificulty over here , the machinary is not a problem at all , i have a nice "lil" CNC machines at pa workshop .. the thing that might be problematic is that the 1mm driller is so breakble :E
also , what hight would be the best for thouse pins ? i thought about smt in the area of 1cm , sounds ok ?