So i'm planning on brewing a double IPA for a local whacky brewing competition. I want to use quassia bark for the bittering. I've made a tea with it and it will get the job done... maybe too much lol. I'm wondering if anyone has ever used quassia and, if so, how much do you think I should use for a 6 gallon batch of 1.090 Double IPA. I am planning on the vast majority of the bitterness to come from the quassia vs the hops.