[luzifell]

well this would mean at least 120-200 minutes of nonstop vibrator action..
best case some bondage were you cannot tell the exact time of it, the not-knowing would make certainly things more intense..
oh and to avoid you passing out maybe ad some more stimulations.. vibs to work on your tits, ass? maybe a low level of udder milking device sucking on your nipples?
oh and knowing of your kinks this is something that should be setup outside in the sun in front of your farm