1 to 1.25 inches is wha the Bravo can comfortably handle, you can make 2 inch marbles it just takes time and learning how to keep your heat base. Once a 2 inch marble cools down it's hard with the Bravo to get all the heeat needed back into the center, it can be done but it takes time.
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Roy
Hot glass does not crack.
Unless it is glowing and drippy, hot glass looks like cold glass.
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