I have used both, and the SDC is much more user-friendly. I "adapted" a Kriss to use on the Helix, and it does work okay, if a bit kludgy. Sometimes, if you don't switch to low beam before you shut the engine off ( it only works on high beam), it does not start again on restarting the engine. It requires that you flip the headlights from low to high beam quickly 3 times to re-start it.
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