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I have cut down all our venetions with a GMC 210mm drop saw, but i fitted it with an irwin thin kerf 40t blade and it was easy and produced better ends than were on them to start with. I have cut 22 blinds and not had a problem most were cedar and some were the white plastic type. Saved a heap doing this in one room saved $700 so i bought a new saw!
Held them by hand against the fence up against a clamped end stop. Mounted blind on F clamps from the garage door opener to remove and refit slats. Saw also cut plastic top rail and timber bottom.
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Really not worth the trouble imo . I recently bought timber venetians for 3 front windows ,big glass area - 2 are 2300mm wide and 1 is 3700mm wide (avg 2m drop ea). The lot cost just on $1000 . This was nice grade western red cedar .Includes brackets pelmets screws etc .
