So here I´ve routed the 1,3mm channel for the purfling and below you can see my hands bending the purfling on my supersimple bending iron that I also used for bending the sides. Its made of a 25mm iron tube that I found. Then I went to the chinese store and bought a 60 watt soldering iron ( 4,-€), which I crunched with a hammer and took out the element. The element I put inside the tube, I plugged both ends with aluminium paper. And here we go. It works the best upright. Then you can find the part that has the right temperature. The further up, the hotter it gets.