Selkirk produced a Jekyll and Hyde sevens showing at Philiphaugh – fortunately for the Souters the former character shone in the final.
A 27-7 triumph was one of their most convincing victories over Melrose in recent years, owing to a rampant performance throughout the 20 minutes.
However, they had been sluggish against Falkirk in the first round, needed a last-gasp try to beat Glasgow Hawks in the quarters and squeezed past Gala in the semis.
But their previous poor form disappeared against the Kings of the Sevens leaders Melrose, who were simply torn apart.
That was mainly down to Selkirk’s efforts, but also Rose’s semi-final against Watsonians that went to extra time and sucked the energy from their squad.
The win was the homesters’ fifth in six years at Selkirk Sevens, and their 13th in total.
Selkirk skipper Gavin Craig said: “We saved our best for the last game.
“With all respect to Falkirk, we found it tougher than we thought it would be against Falkirk, and used up our get out of jail free card against Hawks.
“We always knew Gala would be tough, but managed to get through.
“We hadn’t beaten Melrose all season but got off to a great start and made sure we gave them no time when they had the ball because that is when they are at their best.
“It was a great win for the supporters. Hearing the support, and the silver band playing, really inspires you.”
Angus Duckett opened the scoring for Selkirk in the final, then player of the tournament Darren Clapperton produced the perfect chip kick to dive over himself for Selkirk’s second try.
The Souters were utterly rampant and added to their lead when a trademark Craig break was finished off by Callum McColm to make it 17-0.
Melrose replied through Graeme Dodds just before half-time to give themselves a chance.
However, the destination of the cup was decided just after the break when Craig scored Selkirk’s fourth try to open up a 15-point lead.
And when Callum Anderson dropped the ball as he strode over the line, the hosts knew it was their day.
And as the music of the silver band echoed around Philiphaugh, the skilful Rory Banks danced his way over the line to send the faithful wild.
Melrose captain Graeme Dodds, whose side still hold a four-point lead at the top of the Kings table, said: “The guys were absolutely done after the semi-final.
“It is always hard playing Selkirk on home turf but we made silly mistakes to give them two early tries and we could not get back into it.
“But we are still in a good position for Jed-Forest Sevens next week.”
Before the final, the moment of the tournament was an audacious pass behind his back by Banks to set up Duckett for the winning score against Hawks.
Craig said afterwards that it was the type of pass you try if 30-0 up, not when on the verge of an early exit in front of an expectant home support.
Melrose had their own lucky escape in the quarter finals, when Andrew Nagle came back to haunt his home town team Jed-Forest with a last second touchdown.
The highlight of the first round was the opening match, as Gala and Heriot’s were locked at 19-all at full-time before the Maroons grabbed the ‘golden’ try through Craig Keddie.
Melrose Sevens semi-finalists Ayr chalked up one of the biggest wins in the Kings of the Sevens series so far with a 55-0 hammering of Berwick in round one, but were then on the receiving end of a 35-0 thumping by Watsonians.