For anyone reading this thread looking for more actual info...
Don't listen to anyone saying pressing flowers is a waste of time. It isn't. 25-30% returns is easy with good material and proper hydration of your material. Some people struggle with yield and for anyone trying to improve yield try getting your buds more moist before pressing. More wet than you would like to smoke normally. At least 65% but 62 is ok if you're using
boveda packs.
The proper moisture level cannot be underestimated as one of the most significant factors in yield. If your bud is dry the rosin won't flow but instead will soak into the dry plant material.
Making your presses even is important as well. You don't want lumps that become more dense than other areas as that will create uneven pressure.
And what commercial market did rosin tech die in!? Lol