Not only do they copy parts, but they also modify and improve designs, even making their own tools: notice for example the bellows made with a bicycle wheel at the beginning of the 1st of 3 videos. Several dozen men with specialized skills are gathered here for a single purpose: to transform piles of scrap iron into finely finished tools, stoves, replacement parts and other useful implements for sale to the local population.
No sólo copian partes, si no también modifican y mejoran los diseños, incluso hacen sus propias herramientas: observen por ejemplo el fuelle armado con una rueda de bicicleta al principio del primero de los tres videos.