Shimming issues on Bruker AvanceIII-400 solved

 The shimming issues on the Bruker Avance III 400 seem to be solved.

 In the past few weeks, samples were failing at an unusually high rate on the Bruker 400. After updating the shims and more calibrations, the issue seems to be solved. 

Remember, do not use very short (under 400 uL) or very long samples (more than 700 uL) for optimal shims.