All of our markers, from Ethas through to CSLs, are tested extensively at the factory so it is very unlikely that the marker had a defective solenoid from the get go.
Admittedly, the leak that you have described sounds solenoid related, so could you remove the grip frame, then attach your tanks into the OOPS and slowly gas up the marker to ascertain exactly where the leak is coming from?
Finally, if you haven't already done so, please can you register your marker here for warranty: https://warranty.planeteclipse.com/site/signin
. It's best to do it now in the event that you need the assistance of one of our Eclipse Service Centres.