I have been reading about the raincovers for Exterras that don't fit. I bought one and the first time I removed it, I sprung the hinge on the battery compartment. I had to send the brand new detector back in to be fixed and asked for a new raincover. The second raincover was tighter than the first on. Not wanting to break the detector again, I ripped both seams up the back and had my mother sew two pieces of velcro just under where the coil wire screws into the back of the control box. It works like a charm, but I know I wasn't the first person to complain about how ill fitting the cover was to Minelab. Someone has to take the "bull by the horns" and get this screw-up fixed. It is not rocket science, but just a matter of making the cover 1/4 inch wider. It is impossible to get this cover on and off to change batteries. I heated it up and stretched it , but that really didn't help much. A person should not have to modify a factory item to make it fit. I believe all the covers are defective. Just my thoughts. R.L. Johnson