I've hunted with an Explorer II for 8 years and recently bought a CTX 3030 that included the 17" coil. The sounds on the CTX are very similar to the Explorer II, so it's not like starting all over again. This past weekend I went to a cut hayfield that I last searched on New Year's Day for 2 hours and found nothing. The CTX with the 17" coil dug 9 three ring minie balls, one Williams cleaner bullet, a Yankee eagle button, and 3 pcs of melted lead that were all 12 to 14 inches in the ground! The ground was dry as a bone, so the holes were very hard to dig--I'll have to hit it again right after it rains, but before the grass grows up. Don't be afraid to make the change from an Explorer to a CTX! After 3 hours of hunting, my shoulder was tired from the big coil, but it was worth it with the ground it covered and the depth it got.