If you race single handed don't do it. The hassle of letting go of one rope (course/traveller) so it can then wash overboard to then have to reach for another rope will be far more hassle than a slightly longer mainsheet.

My imaginary F16 (the one I've been threatening to build four quite a while) will have a tornado style internal cascade main, primarily because it will be much cheaper than the big blocks required to make a conventional 8:1 main.