As you know, the Sixth Tradition says that an "OA group ought never endorse finance, or lend the OA name to any related facility or outside enterprise, lest problems of money, property and prestige divert us from our primary purpose."
I'm assuming you have already read the excellent chapter in the 12&12 beginning on Page 153 since you said that you wanted information other than from it and the Big Book. You may find some interesting reading from a Traditions Workshop held by The Recovery Group. The shares presented in that workshop were excellent. You can find the Workshop Leaders' shares at the following website. I hope it is helpful for you:
In loving service,
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