The article describes the final stages of a stained-glass panel assembly in the Tiffany technique: grinding of pieces, wrapping them with a copper foil tape, soldering, framing and cleaning the finished stained-glass window in line with all safety precautions. Adherence to the given recommendations ensures that all assembly steps are carried out in optimal time, in a mode that is convenient and safe for the work performer, the amount of valuable materials is lessened, and life of expensive equipment is extended. The paper finalizes a series of articles which cover the basics of working with stained-glass windows in the Tiffany technique. The previous articles, published in the first three issues of Secreta Artis, have described the development of the graphic part, equipment for the workshop, preparation of the workplace and the initial stages of the assembly. The text characterizes the best purchasable materials, equipment and tools in the current Russian market. The above-mentioned types of work only require accuracy and practice, therefore the proposed description is suitable for both professional and amateur work.