Hallo Travor,
 
no one of my beekeeping friends is using the temperature methode to kill
varroa.  Also i have never heard about a practicable methodes of temperature
killing varroa. Only in scientific publications some poeple discuss about it.
Actual varroa traetments here in germany are fluvalinate (flumethrin) and
organic acid. For the last one there exists many different successful methodes.
(evaporators, dropping the liquid directly to closed winterbees, spraying all
the frames with bees and so on)
 
 
Hans W. Wunderlich
Germany