The endpointselect option is sweep factory input 4, with the factory in C code, so the simple answer is no, IMHO.

However, the sweep has history, so after the pointy sweep is made, either or both ends of the rail(s) can be extended to
a newly placed object. History then widens the tapers, so the new sweep can be trimmed to its original length, with a
larger radius. This is one simple possibility, with only limited testing.

- Brian