Returned to my local park and continued my Jedi knight training with the F-75. 8 targets recovered, 2 silver (51-D quarter and 47-S rosie) and 2 wheats (30 or 39-S and 55-D). Started swinging and within a couple of minutes got a nice sweet, repeatable tone that sounded like it was miles away! 8 inches down, 51-D quarter! After a couple of wheats, I got a tone that sounded like the guy stuck in the spider