Sounds to me like the cooking forum needs to rediscover what is involved with regards to food and cooking. My opinion is, if you posed the ??? at the cooking forum like you did here, it is no different than asking how much burgundy goes in Boeuf Bourginon. You ought to ask that on the forum and I bet you everyone answers it. I am afraid someone(s) on the forum needs an attitude adjustment and I think you should hunt around for another cooking forum.
BTW, I hate beer, despise it in fact, but the blackberry stuff sounds intriguing.
I wouldn’t give it another thought. Let us know how your batch turns out!