How to get proper mesh from an Extra Objects Curve addon when converting

I played a bit with the Curve objects from Extra objects addon. One I found particulary interesting was the curly curve. However it seems its not that easy to get a proper mesh when converting it. It seems those with several branches are not connected. Any tips on how to keep them connected so after the conversion mesh isnt split up ?

Additionally when the original curve has some Extrusion I also get this result at all ends!

I would just clean it up afterwards manually.