only murphy's law that says' twig will destroy his lens by playing with parts not meant for clumsy american fingers'.
I am still trying to get my head around the hot mirror filter issue anyway, as that is the only thing I would consider using. I shoot under stadium lights with teams in polyester jerseys and I worry about color shift (though I have not foudn any examples I don't think). I can say that I preferred the look of auto WB when I had a hot mirror filter. The last filter also served the double purpose of protecting my lens from a subway-realted impact that blew it up last week.