Thank you very much :]
I use paper towel as substrate but do put some aspen in there in his hide on the warm side. I def think the aspen was the culprit. I bought some more aspen tonight from a different store.I baked his wood. And cleaned his tank. So all is well :]

He shed tonight as well. A success, all in one piece.
I grabbed the shed and measured it at 55 inches. Or 4 ft. 7 inches.
He just keeps growing and growing. Even being off feed
In the past 4 months he has:
grown 7 inches
gained almost 500 grams.

For a male I'd say he is getting pretty big.