@aupatking - Yeah there's definitely a black art with fins. The "logic" behind tuning fins can change based on the type of fin. For example, what might make sense for an adjustment to a standard 5 hole fin might not work at all on the CG fin, or whisper fin and vice-versa. In short, different fins can require some slightly different movements to achieve a desired outcome. Guys who have a 5hole fin figured out, might feel a bit lost tuning a CG fin as there are some different dynamics at play.
Things get even a little more complex when we start adding in different bindings which input torque against both the ski and the fin from various heights and positions. Higher & stiffer rear bindings really can make things confusing at times if your talking about fin setup with a someone who is more experienced with a stiff front boot & kicker.
Fin setup is not simple, and there is never a "right' move despite how many people think they have all the answers. Even for the most experienced guys in the world there's still a huge amount of trial and error. Make an adjustment in one direction - if its not immediately noticeably better, head the other way.
The other challenge can be tuning a ski for your hardest pass. Sometimes what makes your hardest pass perform better might make your earlier passes feel like a school bus turning. That just means you need to hit the earlier passes a little harder with some more energy and get back to the shorter lines where you were looking for a change - and conversely don't be fooled if your opener feels AMAZING, but then your 3 buoys short at the top end.
Then consider your ZO setting...Fins can be tuned to work better for C*, but not work well with A*. and vice versa.
This sport is confusing, full of complex variables and it takes a solid support team to get things figured out. Never be afraid to ask someone for help. If what your told doesn't "work" for you, just be thankful, keep an open mind, learn what you can from the experiment, and then maybe make an adjustment in the opposite direction of what you tried before to see what happens.