Does anyone know how to get into the GT40 cabinet to repair a broken 3.5mm headphone socket?  I just can't see any way in, having removed all the screws showing.  I did email Fender but they advised getting a professional to deal but I can't find one!  I did read that it is designed as a 'throw away' if it breaks down.  I live in Maidstone.  My dilemma is that I use it as line out into my Bose Tonematch in order to achieve a better sound as it's a small cabinet.  Mick