Ok, so i have an RG4, and i need to replace the strings... i read the manual carefully and did everything it told me to, but still whenever i tighten the locking nut and move on to the next string, the last two i tuned go out of tune. it says i should tune/change strings one by one, but this is impossible since the locking nut has 3 pressure pads, 1 for each pair of strings, so i have to do it two by two. i'm finally fed up with it since i spent about 3 hours on it last night, and a couple today as well, it's pissing me off pretty bad, please, i need help.