Ugly Link

Hi ,
How can i make link & arrow head look noice as pic. 2 below?,
PS: I'm using GoSimpleNode with Label and 2 Ports.
1) . Smooth Link and ArrowHead
Pic 1) . Ugly Link & ArrowHEad
Pic 2). Smooth Link & ArrowHead

Set the EndSegmentLength on the “to port” to be 2x or 3x the ToArrowLength of the link.

Work fine.
Suwit A.