Some added suggestions:
1.) Try an autoclave, it will improve yeilds dramatically, medical supply and laboratory suppply stores often have used ones for reasonable prices.
2.) Try using rye grain (whole kernel) for the growth media it provides alot of air space, and works well.
3.) Try liquid innoculation rather then using a syringe or spores, you'll get a better result, faster grow times, and as an added advantage you will have a bunch or mush rooms that all look exactly the same.
4.) If you are going bulk then i have swim has found that liquid innoculation of more media is better then trying to bulk propigate.
5.)A company that sells poisinous non-consumables just happens to sell preautoclaved growth media already in jars. . . ever wonder what no contamination would be like. . . it's a good way to get started at least.
Cyril
Now for the azures. . .
So you need a precursor, to a precursor, just to make a precursor?