I few months ago I purchased a Excelerator coil for my ACE 250. Since I put in on I haven't taken it off. I have been getting some false signaling off and on but I thought I might be using to high sensitivity. I've been going between 4 and 6. I didn't think that was extremely high but none the less. After hunting yesterday, I was cleaning some mud off the coil when I noticed it had a coil cover on. When I purchased the coil nothing was said about a cover so I didn't give it a thought. When I took it off it was loaded with sand, dirt and water. Cleaned it out and the falsing stopped. I wonder if there any others users out there that didn't know it came with covers. I thought it was a nice surprise..