The Approach Tennis RST-2 clone history:

In 2003 the SP.IN Japan's supplier (Xpider Co.) copied the mounting system of the Eagnas Hawk 820, and copy the turntable and swivel clamp bases of the Eagnas GA, then copy Eagnas PN-1008 aluminum clamp to create the RST-2 model.

2004 Eagnas Hawk 600 Price: 39,000 2 stainless steel thumb-adjustable clamps (PN-1012)		2003 Approach Tennis RST-2 Price: 74,800 2 aluminum thumb-adjustable clamps