SamGTR

Sorry I know there are tons of posts about this already, but the ball joints on my compression arms are shot, so need replacing. I have read in many places on here that they cannot be replaced by themselves, and the whole arm needs replacing instead. However, lately on ebay I have noticed you can buy just the ball joint like the link below (I assume it is for the ball joint in question). http://www.ebay.co.uk/itm/NISSAN-350Z-3-5-Z33-2003-2009-FRONT-LOWER-ARM-BALL-JOINT-FITS-LEFT-RIGHT-x1-/171006514185?pt=UK_CarsParts_Vehicles_CarParts_SM&fits=Car+Make%3ANissan%7CModel%3A350+Z&hash=item27d0c85409 Can anyone tell me if you can actually remove the old ball joint without damaging the arm, and fit a new one? As it would be a large cost save if so! Thanks