I posted the following under the Brands (Garrett) section of forum, below are my thoughts after few days using the NEL storm. I have switched back to stock coil I will use the storm when I search large areas, at this point it want be my everday coil.
Received the NEL storm coil Monday, I ordered the lower shaft and hardware kit for my AT Pro so make it easier to change between stock coil and the storm coil. Initial observations coil is a bit heavier, it takes a bit getting use to, the main thing is slowing down one’s swing speed. I have I used the storm to over an area that I have hunted quit a bit and found additional coins with the storm. I found the storm to work well in a trashy park area, I detect in Pro-Zero with no discrimination I listen using my head phones to sort out the trash from good finds, yes I still dig trash but you never know what your are going to find if you do not dig. I did do a brief water hunt today and found the larger coil bit difficult to keep it from floating up, for now I will keep the larger coil on for a while longer. I do want to do some beach hunting with the storm.
When I installed the coil did the factory reset, when I ground balance I lower the sensitivity down two to three bars and then raise to full sensitivity to full after balancing, have had no problems with chatter, actually think I may have had less chatter with the storm than the stock. I have been back and forth on getting the 5 X 8 coil which I may do in the future but for now the storm and the stock seem to be doing a great job.