From what I've heard and experienced myself is that the osprey tends to get bit alot but not hold onto the fish.Maybe if your throwing the 7 inch it might not be good to add a stinger but mayde look into the pro-rigged ones.If your throwing the 9 inch maybe add a stinger yourself.

This is all JMO and you might find that the stinger hook may ruin the action or foul up alot while casting.Just thought I'd mention it since you said you might have lost a fish.

I'd say keep lookin' for the trout too that's where some descent fish should be hanging around.