I recently assembled a Vellman K4040 vacuum tube power amplifier. The amplifier works well. It is nice to have an amplifier with the full schematics and part numbers in order to do repairs. Here are some pictures of the process. It was hard taking a good picture of it fully assembled because it is so shiny. My reflections can clearly be seen.

k4040 cabinet open
K4040 with the cabinet open.
k4040 cabinet closed
K4040 with the cabinet closed.