Hello Everyone, There's a couple things I noticed with this coil. I put in a easy 6 hours hunting with this coil at Rich Hill last saturday. On a couple of old pushes. No gold. I found small dozer shavings at around 4 inches deep. shape may have something to do with that, cause they wont weigh on my grain scale. That I have not experienced with my Joey or my e-mono 14" nuggetfinder. Plus, I put my coil over same types of dozer shavings at maybe 1" and it about blasted my ears out. When i went to dig them I was expecting a lot bigger piece of metal or gold. I think this is a great coil. As far as the crack goes, probably around 1/32nds of a inch. As far as I'm concerned, any open spoke coil should be taped on the inside as well as the outside. Some grains of sand got between the coil and the coil cover. But the way I abuse my coils, I'm not surprised! I've had my Joey coil for less than a year, and I've worn holes thru both the bottom and the top, not just the cover, on the Rich Hill granite. I have to patch it almost every time i play in the boulders at Rich Hill. Platypus mono = great coil for it's size. Thats my 2 cents worth. Take care, Steve