ArTurf....the micro package that I use is a liquid form. Is yours granular/powder concentrate? I am just applying to shrubs but from your other post your cost per k would work out to be in the same ball park. The product I use is called Complete. There is also a good liquid with micro package out there called Eagle 6 from plantfoodsystems that is in the same ball park. Hope that helps.
Other than that...try hitting Greendoctor up on a PM. He has proved to be very knowledgeable on the subject and has been kind enough to respond to questions I have had.