Originally posted by EyesWithPrideB3:Yup Sergio, that's a flat nut.
And to refresh the question above yours, I actually don't know anything or have even seen that pedal you posted a picture of- but wait for our friend Jeff to find the topic again, he can usually be of some great help.
You might also try searching the Guitar Center website for the pedal to see what it does, or even the manufacturers website for a possible manual if you don't even have a clue how to use it.
I don't actually know much on the G2NU. I'd say sell it, save a bit more money and buy a Line6 HD 500.
If you bought the G2Nu in the last 30 days from Guitar Center (some other dealers are decent too) you might be able to return it to the store for full price.
If that isn't in the cards, sell the G2nu and Boss pedal. Then buy the Line 6 HD 500.
Line 6 M13 is great too but as the M13 are HD 500 are the same prices and the HD 500 does more... I'd vote for the HD 500.
One can get a lot of great guitars tones / a lot of Edgelike tones for $500.
I don't feel comfortable on electric 12 strings either, and you're right: it's harder to play riffs and solos than on standard strung guitars! Moreover, Edge doesn't make the most of his 12's (personal opinion), so you don't need to suffer the 12-strings unconvenience in order to sound like him. Just get some nice chorus onto that Ricky beauty and rock on!!!!!!!!!!!!