Hi Takeflight--I am currently working on that process--of using already started mycelium--seems logical--I will try to update the progress in a week or so, basically all I have done so far is take a lid that was covered in mycelium and put new substrate on it and cased it after I took a cake off it and cased that-- I have always just washed off the mycelium that was left but thought why not give it a try! Have you experimented at all with it yet? Contamination will be the only reason I could see it failing--the mycel has food so it should continue to grow