Mark Adair claimed the MOM award as CIYMS recovered from a poor start to beat Instonians by 98 runs and collect their third Gallagher Insurance cup win in five years.
Josh Manley's new-ball burst had CIYMS reeling at 12 for 3, but they recovered thanks to two significant partnerships.
Firstly, Jason van der Merwe and Obus Pienaar (27) added 81 in 22.3 overs, with 'Van The Man' once again shining on the big day, hitting 4 fours and a six in an excellent half century from 78 balls.
The pair departed in quick succession to leave the contest once more in the balance at 97 for 5, but enter stage left Mark Adair - another big game player who loves the limelight.
The Irish international struck 4 sixes and fours in a dashing 63 from just 55 balls, adding 110 in 98 balls with Ryan Hunter (39).
With Adair at the crease a total of 250 looked on, but his dismissal by Shane Getkate (3-38) courtesy of an excellent catch in the deep by Ben Rose saw the innings peter out, as five wickets fell for 13, leaving Instonians a total of 221 to chase.
The Shaw's Bridge innings followed a similar pattern, as Allen Coulter and Nigel Jones (4-31) took early wickets to leave them at 28 for 3.
Ollie Metcalfe - fresh from an early morning airport dash to the ground along with Ireland U19 colleague James Hunter - led the recovery with Shane Getkate (26) in a fourth wicket stand of 62, before both went in the space of three runs to Jacob Mulder (2-17).
There the similarities between the two innings ended, as Instonians' chase disintegrated going from 90 for 3 to 122 all out, with wickets too for Trevor Britton (2-9) and Obus Pienaar (1-20).
This was the second trophy of the campaign for CIYMS following their Lagan Valley Steels T20 win last week, and they will go into Sunday's Irish Cup semi-final with Waringstown favourites to reach their first decider.
Leading the Premiership, and through to All-Ireland T20 finals day, there could be five trophies in the Belmont cabinet come the end of August.
There seems no stopping the CIYMS juggernaut.
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