An issue with the unit is the bridge itself, which Leo Fender over-engineered. The six individual bridge saddles were multi-grooved "barrels". The individual barrels were not grooved deeply enough to always securely hold strings during heavy picking. Each barrel had a tiny adjustment screw at each end. Adding the intonation adjustment screws, and the screws at each end of the bridge saddle to raise or lower the bridge as a whole, gave the bridge "twenty" separate adjustment possibilities. Many players found this too complicated. That, and the tendency of strings to jump out of the individual saddles led to a lukewarm reception for what was an excellent—if over-engineered—design. Later, many Jazzmaster and Jaguar players found that, with no retrofitting, they could replace the bridge on these instruments with the standard Fender Mustang bridge (below), solving some of the problems.