Collin's 18sx runs a Tiger rig. I bet he's trying to get his spin blocks in the same relative position as the Tiger so the sheeting angle is the same?
Im just guessing here...
Ding ding ding - we have a winner. I spoke to him yesterday and we will do side by side comparisons of a Tiger F-18 kite on his boat and a Tiger at our next regatta in 2 weeks. This should help him land the best block placement for a good sheeting angle.
Chris.