When I think of killing, I think unrepairable. I have stalled some 203V's by simply switching the DC side from the PS. I did screw something up, but Gecko fixed or replaced quickly. I have sent about 5 of these drives back to be repaired. Only one was replaced due to manufacture defect. Switching the DC side of the PS lead to these faults. Mariss found that out and I have had absolutely zero troble with the 6 203V's I have in service. These run just about every day including weekends.