So transferred the mycelium onto a second run of cardboard from the t. versicolor:

I made one pile of cardboard that wasn't touching the mushrooms directly and seemed to have no discernible contamination.

And one more pile of cardboard that was touching the mushrooms and didn't have any significant contamination.

These are layered up with small pieces, with 3 layers of cardboard in between each layer of mycelium-impregnated sheets. Therefore the middle sheet can be taken out for propagation without the contaminants.

I surmise with small pots you could do something similar to running mycelium on agar away from contaminants while still keeping the vigorous mycelium with its natural microbial culture and antibodies ready to be transplanted back into the real world.

Also trying to see if the mycelium will jump directly to dowels so got a small box and put a mycelial face on the bottom and filled it up with dowels that had been soaked in boiling water for an hour.

This strain seems to be a good vigorous grower and was fruiting very well with big fruits when collected.