Not a big fan of single triggers on doubles. But, of those I've tried I like the Ithaca NIDs with either their Miller or the later Howland designed trigger. The safety slide is the selector -- in the middle on safe, push forward right then left, pull back left then right. I can't imagine a field situation where one could use that Fox-Kautzky or Parker Bros. or Hunter one-trigger selector slide in the right trigger slot.