So iv'e got a mex Jazz, and had it for a couple of months, after abouta month,the saddle peice of the bridge on the E-string started gradually slipping down the two screws , i just put it right and everything seemed ok until it came to this gig a fortnight later, by the end of the first verse (20 secondes) the saddle had slipped all the way down and was resting on the metal plate, this meant constant retuning and horrible fre-buzz . I play pretty wildly on stage and thought that this could be the reason it didn't happen in practise, but when i reset the bridge and played it absolutely flat out at home it was fine. I had no problem with it again for another three weeks until the next gig when it happened again - again in the first verse . I didn't have my backup bass (cardinal sin i know)- and the severity of the fret-buzz meant i had to play evrything an octave up. I need to sort this problem out, but am reluctant to take it back to the shop due to its apalling customer service (3 months for a stupid scratch plate!!). Should i just order a new sadlle peice and screws for the bridge or what?