Hi Michael,
I also have a tree boring head. They are a very beautifully made piece of kit. Mine has a MT3 shank which takes up a lot of room when it has to go in 40 taper/MT3 adapter. Consequently I have never used it (also have 2 wohlhaupter heads which are my go to boring heads). Anyway I see you got a copy of the operating instructions. Is it possible to get a copy? This might make me get it out and put it to use!!
Thanks in advance
Mark