SLGuin,
I have a SH mk2. I've hunted local So Cal beaches and the beaches in Cancun and Playa del Carmen. In Cancun I've found lots of small broken silver charm bracelet parts, a couple larger silver necklaces and strangely, sewing pins. I have not found any gold rings there yet. I hunt in standard trash and near zero elimination. I also recently purchased a Mirage PI Ultra 1, land unit, never used. Planning on trying it out today. Did you purchase the water machine that was recently for sale?
Goingcrazy