2+1 fin setup questions (egg)

Hello all,
I'm primarily shortboard surfer, as the conditions where I live (Central California) dictate that kind of equipment choice. A lot of duck diving in this part of the world.
However, I recently purchased a 6'8" egg with a 2+1 set up with the intent of surfing it on smaller days, to smooth out my style a bit, hopefully. I just had a few questions about that particular configuration.
Does one drive it off the tail like on a thruster?
Can one pump for speed on it?
What can I expect, performance wise, by adjusting the center fin back and forth?
Thanks for any and all input.
I'm primarily shortboard surfer, as the conditions where I live (Central California) dictate that kind of equipment choice. A lot of duck diving in this part of the world.
However, I recently purchased a 6'8" egg with a 2+1 set up with the intent of surfing it on smaller days, to smooth out my style a bit, hopefully. I just had a few questions about that particular configuration.
Does one drive it off the tail like on a thruster?
Can one pump for speed on it?
What can I expect, performance wise, by adjusting the center fin back and forth?
Thanks for any and all input.