I purchased my Seahunter Mark II about 6 years ago and like most of you I love it... Here is my Question, since I bought my unit Garrett came out with a new 8" PROformanace coil. What is the difference between the older 8" coil and the new PROformance coil other then the better cable? Is it more stable in the water? Is there any depth increase? Is better epoxy used?