There is a number of people using their mill machines as a lathe by using a chuck to hold the part and the tools are located on the bed in holders. here is one. https://www.youtube.com/watch?v=7EOENs38kCo&t=222s&list=PLqBYw7iObyi40M6WA_WpyiiSTZGhzFsLw&index=4
this is a brilliant idea but generating the g code is difficult to comprehend.
adding this feature would be fantastic.