The new Goon v1.5 RDA is an upgrade from the best selling RDA of 2016 the original Goon RDA. The original designers 528 Custom and Blue Eyed Goon have now released the V1.5 so as to improve on the original design. The main differences are: The internal cap is domed vs flat cut, Cyclops airflow which allows better overall adjustment vs the holes, wider and thicker posts with most of the bridge removed to allow strength from bending and spinning, 1.5mm taller screws to allow for more clamping space, thicker upper clamp, no gold plating, hex key, hex and philips/slotted screws, hex bottom feed/squonk pin.