I recently bought a pack of five M17 coils that all leaked juice out of the air holes on the side of the stick, turning it into a sticky 
...
On closer examination, found that the rubber stopper and contact at the bottom of the coils was a little "wobbly" / loose, to which the addition of a small O-ring, (see pics), resolved the issue ... I used one of the small O-rings from an old RPM coil, but I'm sure any small O-ring would do the job.
... On closer examination, found that the rubber stopper and contact at the bottom of the coils was a little "wobbly" / loose, to which the addition of a small O-ring, (see pics), resolved the issue ... I used one of the small O-rings from an old RPM coil, but I'm sure any small O-ring would do the job.
