So I'm looking to get an extra shaft for my speargun just to be prepared for that one day that I either lose or bend/break the one that I have. I have a mares bandit 75cm, it uses a 7mm tahitian flopper shaft with shark fins. I'm just curious on if for getting an extra shaft I need to get one specifically for my gun? Or if I can get a shaft of the same type by a different manufacturer? Any help is much appreciated.