Drummond, a New Zealand age-group representative, won the three-end tiebreak 2-0.
"It was my first time in the PBA. It's a top-level competition that has good bowlers from Manawatu and Wellington," he says before the Heretaunga club hosts the finals weekend on September 12-14.
The finals champion will win a trip to a Scottish tournament that will have an elite British field and lucrative prize money.
"I'm going to join Heretaunga club," says Drummond, agreeing he's "too nice to say" Kia Toa isn't the ideal platform for aspiring players with lofty ambitions.
"My father [Craig] and grandfather [Bill Rae] understand it and will remain at Kia Toa," says the youngster who has won a few club triples titles with the duo amid numerous others on his own or in pairs.
Heretaunga club also has calibre players, such as Glassey and Tony Terry "so Kia Toa lacks that".
Drummond imagines he went in as an underdog last weekend.
"Most players have a lot more experience than I have."
That is not to say the teenager suffered from bouts of jangled nerves - on the contrary, actually.
"All weekend it's the calmest I've ever been at tournaments.
"I knew I was playing well enough to have a good game so I knew I could come back," Drummond says of the first game of the final when he was leading Glassey 6-2 before the latter picked up a cluster of four to crowd his bowls out to level terms, 6-6.
The winner pulled out a couple of big shots in the tiebreaker.
All their "heads" (bowls) were in the money area.
"You play to win ends, not for winning shots," he says, winning endorsement from Glassey for his mental fortitude.
Drummond beat Laurie Guy, of Wellington, in a tiebreak in his semifinal while Glassey had a similar outcome against Terry although it came down to a nail-biting last bowl off.
"It's good to play like that [competitively] as much as I can now."
So is the talented teenager a sign of the changing of guards at Bowls Heretaunga?
"Oh, Murray's still the best," he says of Glassey who retained his Transtasman PBA title in East Cessnock, New South Wales, last month.
"I know I'll have a little target on my back now," Drummond says with a laugh.
He forged ties with Heretaunga member Gavin Keighley to clinch the PBA ranking pairs, beating Bowls Napier duo Paul Sorensen and Ken Smith in the final which went to the last end of the tiebreaker for a 2-1 result on the foundation of a cracker shot from Drummond with barely three centimetres to draw from.
"It was a last-minute composition team because we didn't have anyone to pair with."
Drummond also has his eye on two other PBA qualifying tourneys - in a fortnight to qualify for the International Open at Potters, England, which will include a ranking singles tourney on the Saturday, and in August is the Welsh Open at Llaneli.
The other qualifiers for the Hastings final are the Waikato duo of Wayne Stewart (Scottish singles qualifier), Raika Gregory (Henselite Shanghai singles qualifier), and Andy McLean, of Dunedin (Scottish singles qualifier).
In a non-PBA Henselite Shanghai singles qualifiers' tourney last weekend in Hastings, Bruce Ferrick (Bowls Taradale) beat club mate Dave Henderson and Steve Love, of Johnson Park (Feilding).
Sorenson won the plate section from Bowls Heretaunga players Natarsha Grimshaw and Michael Isaacson in the final.
