So I have a Yamaha RGX-121z (OMG, LOL, LMFAO, WTF, insert generic insult here). I have no idea what gauge strings they are but I know that when I try to tune to at least Drop C, the strings get very loose and the sound is terrible. So, I'm looking to buy new strings. I'm thinking about maybe purchasing 12 gauge ones, but I am not sure. I also will be playing in Standard, Drop C and Drop A tunings and I am wondering if there are any strings out there I can use to play in all of those tunings with good sound. Thanks in advance 
