@Antics ,@cromag27Matt,
Any way to hybrid this with your FFF? Lets say maybe 5" across and two of these clips on the front corners? I'd love an all in one solution where I can keep something in the tank to drop frozen in and can easily remove to attach nori. Might even be able to get away with the one magnet?
Was this idea of a hybrid device ever realized? If so I'd like to see how that turned out and may be interested in one also!