i just bought this guitar and its pretty old 15 years old. when i push down it goes like mayb 2-5 cents flat sometimes. when i pull up it seems to never go out of tune sometimes it even fixes it after going flat from a pull up. when me and my friend really played with it to hear what it can do when we were done with playing with it for 5 minutes it went out of tune 24 cents sharp. when i play with it not using the tremolo it seems very stable never goes out of tune. my tremolo is a lo pro edge on a 1995 rg570ct. the poles look like they could be warn as there is a gold line in the middle of the v which i guess could be from where as my tremolo is gold. the knife edges could look better but did not look totally like they could be the problem. i put chapstick on them and for 5 days it did the trick but now its doing it again. is this typically normal for a floating tremelo and as good as it gets or what can i do? i am using 10's for strings and my knife edge lays flat easily all the time and looks like it finds the center of my poles as it always looks parallel with my body when its at rest. i noticed for some reason my guitar came with 5 springs already installed so it seems to be capable of staying stable. i just dont know what to do? i think i probably need to replace the poles. but in the mean while what else can i try that might fix it? is there anything i should do to my knife edges? is it possible to buy new knife edges and how do you replace knife edges? is it hard? what else can i try in the mean while before my poles get hear that might fix it?