In the U-tube Video, he demo his clever idea for slotting a motor shaft on the Lathe. Typically this is done on a mill as tool of choice.
This could be modified for use as a cross hole driller. Yet another way to drill cross holes. His concept can be utilized for a number of other operations as well.
Adding the V-groove on the tool fixture with the Lathe, provides PERFECT alignment...
I might have to make one of these just for COOL factor. https://www.youtube.com/watch?v=X3yaNb72DQI
Probably old news, figured some might not have seen it.