I am wondering about the same things. My 2010 switchblade died, want a bit more reactive 12, switchblade 9 is fine.
Cant find anywhere how to turn monolith bar to single line and i got 12m bandit 8 practically for free and in pristine condition. Anyone?
Regarding safety:
My switchblades (ids 2010, 2011) work on 2 front lines too. In normal to well powered situations, works flawless. Kite just disconnects, turns upside down then slaps on the water sideways depowered, like 5% pull. Regarding my 12m, in marginally light situations, kite did the same thing, stayed LE down and still catching some wind. Its like not enoguh force to turn the kite on its back. I just pulled center lines 2 myself and it would fix itself. Only in light wind, never in normal or well powered conditions.