Quick hands from inside their own half sent Harry Kapi free down the touchline, before the diminutive but combative centre jammed inside the fullback to score in a handy position to set up a 10-0 lead.
Kapi scored his second soon after as the Eels continued to feed the outsides after shaping to the inside.
The 14-0 margin grew to 20-0 at the break courtesy of the first of Ainsley Skudder's two tries; just reward for the Eels pushing the ball to the outside of a compressed Panthers defensive line on an early tackle.
Mikaere October showed his worth with a beautiful run from dummy half - featuring a number of body swerves and dummies - to open the scoring in the second half, ushering in a long period on defence for the home side.
They relented only once, through a try from hulking back-rower Lea Fangufangu, but in large part the Eels defence was impressive in terms of both line speed and aggression.
Skudder's second, coming from a ricocheted Weedon grubber 10 metres out, gave the good-sized home crowd one last reason to cheer on a picturesque day at the Otumoetai outdoor amphitheatre.
Otumoetai Eels 32 (Ainsley Skudder 2, Harry Kapi 2, Josh Tupou, Mikaere October tries; Josh Weedon 3 cons, Detroit Paki) Ngaruawahia Panthers 6 (Lea Fangufangu try; Jonty McBeth con)