OK, had a great session yesterday with the new 15/4. Slows down a bit more than the 15/6 but no where near the way the 16/4 did. Good pullout, quicker spool up with higher RPMs. No tach, so no data yet. I left the right thrust at 3 degrees until I saw how it responded to the 15/4 and turns out that it needs more right thrust. So at this point do I add more thrust angle or mix it out with rudder to throttle? Pro's/con's? THanks, Joe