6 oz is a VERY small tank for a pattern plane. I don't know what engine you're running but you most likely won't get more than 4-5 minutes. That might not even get you through the Novice pattern if you have to wait to take off - if someone is landing for instance. IMHO, 12 oz is about the ABSOLUTE MINIMUM tank size for a .61.

Just my 2¢ worth.

Jim
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