I've been experimenting on the best places to mount my electronics to achieve the best CG with my batteries (rather heavy AirThunders), This configuration seemed to give the best results but I am concerned about the chances of radio interference and glitching with the ESC mounted so close to the receiver. Will this cause problems?

The antenna ends(FASST radio) are roughly 17 cms away from the ESC angled at a 45 degree angle (90 degrees in relation to the other antenna). The ESC and the receiver are staggered with the ESC's rear edge just below the receiver's front edge. Please view the attached photos.

Thanks and a belated happy new year to everyone here!

You want the antennas as far from other electronics as possible. You can only test your installation to see if it's working correctly. Otherwise, you'll have to move things around. If you can't obtain the correct balance point by moving equipment, then you may have to add weights in the proper location to balance the model.