All I can say is that my left-handed 2012 American Standard Jazz was flawless. The wood; fit, and finish were all world class, and the hardware was perfect. The standard Custom Shop pickups are the best jazz bass p'ups I've ever heard. This bass is leaps & bounds better than anything I ever saw or played in CBS era 70's.They have had my attention recently.
The early 1980's were a total abomination.
All my Rumbles (4) have also been perfect performers with nary a hiccup. My oldest is a V2 Rumble 75 that is 6 years old, and was my daily player until I recently got a V3 Rumble 200 combo that I dearly love.