Looking for the help of more knowledgeable people. Recently bought js100 Korean model. Everything sounds great and a good setup. But the trem is awful. Quite stiff and even with light use it looses tuning easily. I've had similar guitars before and never had this issue. I see from reading that this is quite common on this particular model. I've installed and setup these trems before but I don't know which one would suit to fit without any routing. I've read countless posts but so many contradictions . If someone out there has actually done this and can give me the exact make and model of replacement tremolo I'd be delighted.