Hey brother, I just wanted to let you know, since we both use the CoM amendments. I am running an experimental plant, a Meph Orange Biscuit.
I have always been concerned with CoM's Bud and Bloom not having any K, but also having a high cal percentage. On this plant I will be supplementing my B&B feedings with Down to Earth Langbeinite 0-0-22, which should add the missing K and also has 10% magnesium, this will hopefully tackle that common mag deficiency, and eliminate the epsom treatments.
I'll keep ya posted if it works.