I am shooting these for the first time this year and my second time out I noticed my magnet fell off my bow that does the activating on these So I tried to find a magnet similar in size, but had no luck, so I went to a little bigger one and it actually changed my point of impact by 3 inches left at 20 yds (keep in mind I mounted my magnet on my riser on a right handed bow which pulled the back end of my arrow to the right enough to change my impact that much...anyway it caused me to hit my deer 3 inches back from my aiming point and almost lost my first buck!..The next day I shot field points and same thing and thats how I came up with my conclusion
Get a hold of Easton to send you a new magnet, thern glue it in place. I've been using mine for 4yrs now with no problems. deerman