4% isnt a terrible yeild from outdoor nugget.. the norm is within 3 to 10%... the latter showing up very rarely. You are totaly within the right levels.. however if you like.. you can rerun the buds another time after breaking them up more.. im sure you will have already gotten what is there. but it will let you know for sure

peace
Bubble man

ps.. dont ya love asking a question and getting a question for an answer lol