The Fearless is better (tuned even) for turtle and insane based moves (the SD is horrible for insanes).
Since I 'learned' how to do an insane, I have only ever done them again when asked to show someone else how. Funny, they are pretty horrible on the SD. It makes the insane cascade harder. It is easier on the heavier mid vent. The SD the most beautiful taz machines once you crack it. As nice as the Nirvana...spinning on a pole.
Look back at those old videos of Lam on the beach with a Sea Devil and tell me you don't want one. Youtube=uDJXsC_Q8EQ for example.
"When once you have tasted flight, you will forever walk the earth with your eyes turned skyward, for there you have been, and there you will always long to return." L daVinci