The slip joint connection would make it easier to build a straight arrow.I think it would lend itself more to aluminums.I'm not sure I would be comfortable shooting an arrow with a carbon to carbon joint,mid-shaft.
The reason I wanted to make the monopod,besides wanting one,was to play with that joint idea.The Victory inserts I had were lighter and more precisely built than the Gold tips.When tightened down on the all thread,the joint was tight and fairly precise.
The Gold Tip inserts would have been useless in creating a good joint.I think the biggest problem isn't the insert fit in the shaft or the thread fit but the fact that the first 1/2" of each insert has a wider (.200")unthreaded section.
This means when connected with the all thread,there is a 1" section of all thread that is unsupported.This can lead to a little lateral play.It wasn't bad with the Victory inserts tightened down,but I could get them to shift slightly if I deliberatly torqued them side to side.
When I built my take down arrows a few years ago,I made aluminum connectors,starting with an aluminum broadhead adapter.This gave me that smooth,wider shank to fit into the insert better.
The problem with my setup was that I turned down the adapters in the drill press by using a file and it wasn't precise enough.I had to keep the two arrow halves straight while the epoxy cured.If I had built them on a lathe,it would have worked much better.Still,they shoot well.