Rye is the best whole grain bet for inoculation, it is less gluey. With that method you can shake the jar and hasten complete colonization, than dump a bunch of spawn as needed.
Large quantities of spawn are easy by boiling a bunch of corncob animal bedding, dumping the boiling water a couple of times, enclosing in a sterilized container, then, rinsing with 3% peroxide and when cool, inoculating mycelia water, a similar but faster and larger technique.
PF style jars hold their own water suspended in vermiculite in the mix, as someone recently asked, Swim sees no reason why perlite would not be just as effective in the cake mix.
A coffee grinder is needed. fairly fine grade vermiculite is most often what swim has used.
feed mix is 80% organic brown rice, 20% organic ryeberries, both ground to coarse flour, a dusting of oyster shell or limestone. The oracle has sometimes in season added carefully sterilized leaf material, must try phalaris grass for this.
2 parts vermiculite, 1 part the above feed mix, 1 part artesian water, substitute 1 cup for one part and you will fill 6 1/2 pint jars to the thread line, then cap off with clean dry vermiculite as contamination baffle and and seal and sterilize in pressure cooker. Do not over mix (yes, just like good biscuits!) the cake mixture, you want it spongy and almost loose in the jars, then after inoculation when they are about halfway colonized, you will turn them, slap them upside down and gain that air space. Voila, complete colonization in 2 weeks.
"..he'd buy a hundred pound of yeast and some copper line..everybody knew that he made moonshine.."