As Hutchie07au said, this dual high/low mod is only suitable if you only ride during the day or well lit areas at night.
Since you can't aim the individual headlights independently, you need to drop the high beam angle down to where the low beam would normally sit in order to avoid blinding people at night. This leaves you with the highbeam side at the angle the previous low beam was at, and the new low beam setting aimed mostly at the ground.
So it's doable, and costs a lot less than a projector retrofit, but not ideal. When you need the extra light, most of what is available will be pointing at the ground. I'm not gonna bash you guys about this kind of mod, but personally, if i'm gonna mod something, I'm gonna do it right the first time, no compromises.