Does anyone have any suggestions for mounting the Garmin GSC 10 cadence magnet on an FSA crank? If I place the magnet where my old Cateye magnet was (in the groove on the back of the crank arm), the main Garmin unit seems like it will be too close to my rim/tire (especially when using fatter CX tires). If I move the cadence magnet up closer to the pedal on the crank arm, it's not stable because 1/2 the magnet falls into the groove on the FSA crank arm.
I read somewhere that someone used a shim. I have no idea how I would create a shim for this situation.
Does it matter if the main unit is right next to the tire?
Thanks in advance!