Stewartry bounced back from defeats to Garnock and East Kilbride to complete the double over Cambuslang in emphatic style.
The Blacks kicked off into the wind and the referee was soon penalising both teams as play swung from end to end.
An early break from TJ McCarney brought the first try for the Stewartry after only eight minutes with Andrew Picken adding the points for 7-0.
