Hi, I'm using feds rackets at the moment and although I'm actually pretty leather grip biased due to their amazing durability, I did try the same racket with those white overgrips I think they are called and I really liked it. Problem is... I've tried synthetic grips before and I was totally annoyed with them... I know the one I had was probably the cheapest one that was available coz the store to which I'm never giong back again is too cheap dodgy with their 'special offers' and basically you get a free regrip with the purchase of a new racket and the grip they install is... well... not very good lets say... so that made me change back to leather. Anyway, since I'm such a leather lover and synth skeptic... my question is... if I get these white overgrips, will they wreck my leather grips? i.e. will my leather grips then be covered in glue so if I want to revert back to them at some point will I have to throw them away and get new ones? Second question is... since my leather grips have seen some use... just somewhat dirty really, will there be a problem getting the overgrips to stick on or should I get new leather grips? How do these overgrips stick on? Same way as the leather ones? i.e. is there just a layer of glue on the underside? Finally... the racket that I tried with the white grips, the grips as far as I understood it, were simply over the top of the leather ones, should I just remove the leather ones first (I've removed it recently from one of the rackets because it was poorly put on from the factory and I don't think I'll be able to get away with taking that one off again and be able to put it back on again... the adhering tape was pretty wrecked)? This sort of goes back to the question about wrecking the leather ones. I'd rather not wreck my leather ones, but at the same time I think I also liked the thickness of the racket with the leather underneath. I'm not sure whether my hand is big enough for a grip of >41/2 which is what I've got now but it felt fine so far as I could tell so I don't think that's an issue.