I've added a small Z-axis out of an old DVD-Drive and hoocked it uf to my CNC. At the z-axis i mounted a pen, so now my machine can plot pictures on a Paper or flat surfaces like my "Sprit" or alcohol bottle.
First Test of the X-axis was succesfull. The axis don't have a belt at the moment, because they didn't arrived at time, but a sholace will works fine ; ). Next step is to Design the new holder for the y-axis linear shafts, with a included beltholder.