any one use them with good results? tried them a couple of years ago on a doe, not much blood trail but i think i got jumpy and the shot selection wasnt that great, any way i never found her. went to muzzys last year with good results but i think thats due to learning to focus on my shot and not being so jittery. that shot just stays in my mind for some reason, think the stingers actually fly better than the muzzys and i know they penatrate better. whats you guys opinion on them?