The Planet Eclipse CS3 is more air efficient than its predecessor, the CS2, with most users seeing between a 10% to 15% improvement. Some have reported up to a 25% but this is not the norm. The controversy stems from Planet Eclipse’s claim that the CS3 is 20% more air efficient, which is likely based on testing with a larger tank. While a 77 tank may technically achieve more shots, this is due to the tank simply being bigger. ability to stay cooler longer and provide better performance at a higher volume.