Adding 2x symmetric parts to 6x symmetric parts

[ScottyDoesKnow]

Edit: I'm an idiot. I don't need 2x symmetry, I just added the fuel lines one by one.

Fairly common situation, created 6 tank asparagus staging launcher, now need to add fuel pipes in pairs. I also have to place them first on the outside tanks since direction matters. How do I do this? Whenever I mouse over the tanks it automatically sets it to 6x and I can't change it with X. I know it's possible because I did it on a previous launcher but I don't know how. Is there a trick for this?

Edited June 15, 2013 by ScottyDoesKnow

[MBobrik]

No can do. AFAIK not implemented. Maybe some mod does it. But with stock, you have to use 3 times 2x symmetry.

[ScottyDoesKnow]

Nevermind, figured out that I just added the previous ones one at a time, which is fine for this one too.