Saw this light a few days ago. Really tempting, host cost only $2.5 less 
I don’t understand very well group switching 
“Runing 5 seconds on Low mode the light will flash,then you charge group by half pressing the switch.”
So, if I’m on LO, and then I want HI, it will change the group instead of HI? :~
Host review by match: Review: OEM hosts from CNQG/Fancyflashlights.com