Any old timers run a horizontal boring mill?

Need some help with overcoming the initial hurdles of a learnjng curve. I'm in a fake it till I make it type situation right now. We acquired most of the equipment that a machine/fab shop would have and most of them, there is plenty of information online to learn from. Except for the horizontal boring mill, and I am struggling. The tooling all needs to be made up for it. Nothing I can purchase direct. The spindle is a MT6. My supplier can only get me reducers to MT5. And setting up parts is quite time consuming.

Any advice or know how on being able to turn a profit on this machine would be appreciated.

The machine is a TOS W100 in mostly good working order. Apart from the boring head dropping 0.020" if I cut in reverse travel after forward travel cutting.

Thanks