Great stuff, looking forward to seeing your project here. I do a lot of work outside with composting, cooking, chicken, animal waste, etc. Never sent in my stuff to a lab, well since school for horticulture and doing soil science stuff. Always feared bringing it inside, so I use dosers and hydro theory with various media's for a perpetual grow set up. However the energy to make my solutions is a huge constant. Vs the stability of it being naturally bound up in the media.. again space/time/goal/resource equations.. Cheers and happy toking.