On a side note, you should ALWAYS have a diode connected in reverse across ANY inductive load, regardless of how good the switching system is at handling "noise". The induced back-EMF in an inductive system can be HUGE and is likely to nuke whatever you connect it to without a diode.
The problem I have with the reverse diode across my inductive load, is that whenever I do connect a diode, there will be no more spark.
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