Thanks for doing this; I, too, am really looking forward to the cognitive-test data.

I'm curious/concerned about the illness you mentioned. A lot of the argument against polyphasic sleep is that there may be poorly-documented negative health effects, and immunology is an area where downsides are likely to be found. Some infectious illnesses happen randomly, but it could be that polyphasic sleep is a risk factor and it would be bad to miss that, so investigating (or at least thoroughly reporting) things like that seems important.