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I've never hunted with a Griff, but my understanding is they aren't terrifically big runners. If that's true, you're experience probably won't be a lot different from my AKC Pointer and the dog will check in a lot.
You don't need a check cord that heavy.Get parachute cord. Lot easier on the dog.Train to come to whistle no matter what.
I experemented a lot with CC, hated the ropes as they drag so much the dog thinks your yanking on it all the time.