The Taipan often runs with less rotation than other boats. The tips giving in the taipan tuning guide are good but you may want to increase the rotation a little beyond what is stated there on your boat. Note that the two boats are using different mast sections; the crosssection of both is noticeable different with the I-17 being teardrop shaped and the Taipan mast being oval shape. The Taipan mast is much thinner (63 mm to about 90 mm on nacra masts).

Wouter