First trip out with my BHID 300. Hit 3 sanded in spots. Managed 1 dime, 3 pennies, a lead fishing weight and a 14 KT ring. Also lots of the usual junk, pull tabs,etc.The pennies hit with sound and green light. Not really exciting, but they were in the same hole as some rusted bottle caps. The ring hit with sound and no light signal even after the first scoop. The yellow light came on after the second scoop and the ring showed up after the third. Outstanding. The machine swings a lot easier than my Excal and the buoyant coil is controllable with my straight shaft and belt mount setup. Not perfect but I guess that's the trade off for light weight. I used the gobble-gobble super tune for the whole time. What is somewhat distressing is a lot of the rusted bottle caps hit with a yellow light only. I can usually tell those with my Excal. The new Heineken and others I dig just to be sure with my Excal. So, is it OK to switch back and forth from AM to discriminate in super tune mode and are there any tricks to tell rusted bottle caps so I can shorten the learning curve? Thought about PMing gobble-gobble or Beach Hunter, but maybe some good info is forthcoming from them or someone else we all can use. This machine is definitely going to see a lot of use. Thanks.