Thanks for the update. ... I found his
artificial article from the ECHO Community which gives in detail ( more then other references) how to prepare the corm. ...
https://www.echocommunity.org/en/res...377c5/download ...
As for the water draining from the bottom of the humidity chamber, the above artificial does indicate the bottom should be well draining and the sawdust should only be damp. So be careful how much water is added to your chamber.