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A hat-trick from Juraj Huska clinched Invicta Dynamos' place in the Southern Cup final.
Huska's treble, in the final period of Sunday's semi-final second leg, led to a 7-3 win on the night and a 9-6 aggregate success.
Mos trailed 3-2 after a tight first leg on Saturday night.
Man-of-the-match Arran Strawson and Huska led the recovery from two goals down but Raiders claimed a late winner.
Wightlink opened the scoring when the teams met for the return leg at Silver Blades in Gillingham.
Nicky Lewis and Callum Fowler edged Mos in front by the end of the first period, with Michal Oravec giving the hosts a 3-2 advantage on the night ahead of the final period.
At 5-5 on aggregate, there was all to play for in the last 20 minutes of the tie.
But Huska's treble took the match away from Wightlink and while they pulled one back, man-of-the-match Fowler added Mos' seventh.