Congrats on getting the helicopter set up. I put a GY401 on a long time ago and it pulsed the tail. I thought it was just the features it had that was meant for a tail servo. So I got the GY240 that didn't have those features and it still pulses. I got the rudder to work in the right direction, I think it should have small pulses but not big ones like I have. How does your tail act with no rudder input? I don't know if this is normal or not. I never got it off the ground with the 401 because I thought it was a bad thing. If yours does the same thing at least I know I don't have a problem. Here are my settings that I finished today:
Pins on receiver:
Thro- from ESC
ELEV- front servo
AILE- left servo
AUX1- right servo
RUDD- from gyro

Stunt pitch curve
0, 25, 50, 75, 100

Normal Pitch curve
33, INH, 50, 75, 100

Stunt Throttle Curve
100, 75, 50, 75, 100

Normal Throttle Curve
0, 25, 50, 75, 100

Swash mix
3 servos 120 degrees
AILE +40%
ELEV +40%
PIT. -40%

Travel Adjust (These will be different for you)
ELEV D 71%
U 100%
PIT. H 95%
L 93%

Sub trim (These will be different for you)
AILE L 12
ELEV U 36
PIT. H 22
I love my digital servos on my Belt CP, because those numbers are a lot smaller. They are so much easier to center.

Reversing
Normal: THRO, GEAR, PIT., AUX2
Reversed: AILE, ELEV, RUDD

Nick