There are 4 possible positions in the Attack Mode. I have thoroughly gone through the instruction sheet to find the possible names for them, but they were not listed. So to explain myself, I just called them 1, 2, 3, and 4.
Position 1: Lynx Head over the Pegasis wings
Position 2: Rotate the Metal Frame 90 Degree clockwise.
Position 3: Rotate the Metal Frame 90 Degree clockwise.
Position 4: Rotate the Metal Frame 90 Degree clockwise. Lynx Head over the end of LDD's neck.
Finding the best and worst balance for the 4 possible positions
Solo Spin Test using 125 D (Since it's what I had lying around.)
Position 1: 1:54, 1:50, 1:59 (Average 1:54)
Position 2: 1:39, 1:39, 1:44 (Average 1:41) ---> WORST Balance
Position 3: 1:58, 2:01, 1.54 (Average 1:58)
Position 4: 2:12, 2:06, 2:14 (Average 2:11) ---> BEST Balance
I can now safely confirm that Position 4 has the best balance. It is the exact same position that was posted by ShadowL-Drago
here. Please refer to his picture provided for a better understanding.
* For those who are wondering, the Lynx Head is the one with the yellowish green eyes shown on the cover box.