Most of the middle order chipped in with good runs, Martin van Jaarsveld with sixteen, Darren Stevens with 29 and Azhar Mahmood with 24.
A late flourish from 2007 Finals Day hat-trick hero Ryan McLaren who faced just three balls for his unbeaten ten, as the Spitfires managed to compile a target of 174.
The dangerous Graham Napier followed almost straight away, and the steady rate of wickets to fall continued to the end of the innings.
Middlesex put paid to the Dynamos' challenge with a convincing eight wicket win in the afternoon semi-final.
The Crusaders got off to a steady start with openers Billy Godleman and Ed Joyce, as they began to eke into the target.
But no more wickets were to fall as an unbeaten partnership of 76 between Owais Shah and Tyron Henderson allowed the Crusaders to advance.