i've had an Ibanez rg5ex1 for quite some time now. My friend and bassist thought he was having an intonation problem on his bass and i heard about how to check to see if your guitar was having intonation problems. I tried the method and as it turns out my 12th fret is flat... i've tried bringing up the saddle and even tried to take it back some... nothing happens to the problem... any suggestions? i would really appreciate it.