Also not a fan of leaving the lamp on a fox, but I suppose everyone has their own way to get the end result a dead fox. As for squeaking in I'm a bit of an old traditionalist and use my hand more times than anything else, if sitting in the vehicle then I sometimes upgrade to a piece of polystyrene dragged across the window, not against modern calls, I just get on pretty well without them. (And to be honest you don't actually need them, out on the hill it's more down to fieldcraft)
George.