So, I just got myself a dimarzio Blaze neck for my RG7421. The installation took ages, and the guy said he had to replace the original 5 way switch to a 3 way one, to make things easier. So, I said it was ok. The thing is, after I got home the sound started to became unstable, out of the blue the treble goes all the way up and i loose all the bass, as if I was messing with the tone knob. Can someone provide some advice, or knows WTF this might be?