Hi @steveduf.  If it was the likes of the bows I used up until a few weeks ago, I would say to throw it in the trash.  But that is a wonderful stick (I missed out on one of those a few weeks ago when bidding went to $700.  It was likely a bargain even then).  

The repair I am suggesting will likely render the stick valueless, but may spark a gleam in Mack’s eyes.  Here goes.

Regarding the break in the stick proper.  Saw ends perpendicular to length.  Chuck each end in lathe and bore/ream to 5.5 mm.  Glue in short length of 5.5 mm carbon fiber tube.  Alternate, same procedure but insert approximate 1/4 inch of sewing machine needle segment in each direction.

Regarding the break in stick end.  Discard existing bow head.  Cut off end of donor carbon fiber bow to match desired final length.  Taper end of wood stick with a modified peg reamer to match interior pitch of carbon fiber head end.  Glue with bocaholly’s famous Golf head epoxy or equal, carefully matching frog orientation.

Regarding original damage.  Resolve to end relationship with existing boy/girl friend.

I went to a violin maker last week that had seven bows stamped Nürnberger in his cabinets.  I was amazed that I did not care for any of them.  The violin maker was not.  He said that most of the bows stamped with that name were fakes.  The said that the real ones are wonderful.