This Proxxon milling machine does its job and, if you handle it properly, you can work accurately with it. What is striking is that when the milling head is in a high position, there appears to be noticeable flexibility in the column. In this video an investigation into the mechanical properties of the column and epoxy concrete, and an attempt to strengthen the column.

Link to the mentioned article: https://www.aimspress.com/journal/Mat...
Music: Flight of the Bumblebee, Rimsky Korsakov
Chamber Piano Music, Roman Senyk