Well, my stingrays preamp crapped out, long story short. In order to get a replacement from ernie ball, i have to mail my current one to them. My stingray is late 80s, early 90s or so. Im worried about a new preamp changing the tone of the instrument too drasticly. The guy at EB that i talked to didnt seem to interested in the call and just said "a stingray preamp is a stingray preamp". Have any big changes been made?