if this drive has been flashed before you will most probably need to use a 12v molex with the tray half open . to be honest a benq that has never been touched should easily go into vendor mode when you hit benq unlock it should send magic keys go into 0x73 to show flash properties then simply read firmware jungleflasher should autoload LT 3.0 then simply write then outro . normally a quick 2minute flash .
ha suppose its an easy mistake to make mate if youre new to this as you found out how easy the benqs are to do it takes longer to open and strip the 360 than to flash it . i love it when a customer brings me a benq easy money .
what i tend do to if i get an older 8 series i always return the drive to the console and update it 1st i know this is probably more work than needed but i think if yove go an 8 series jungleflasher will autoload LT 1.1 first in this case but then you have to manually load LT 3.0 to it then flash it again i may be wrong but this is what happens in my setup when i get one of these older drives ..
to be honest mate your talking Fecal Leaking to me cuz im lost when you said 'older liteon series' lol cuz ino nothing about flashing haha but obvs you had more practice lol id ont even own usb pro lol i have maximus thing and probe 3 what evo had spare generouse baby