I don't have too much to add but congrats on the boa. I adore mine. He is such a sweetie, unless he is shedding. Then he can be moody. My boy is in shed now but has been pleasant so far. Mostly I leave him alone while he's in blue. It seems to take forever until they finally shed, at least compared to my corn snakes.

The other posters have hit most of the point but I had one more to add. In my experience boas don't poop after every meal. They don't poop super often so no worries if he hasn't pooped between meals. Also when they are getting ready to shed they tend to hold it and go right after shed.

May I ask why you removed all his substrate?

Also I would not suggest reptile carpet. It can get nasty and hold bacteria. I use reptile bark mixed with forest floor for my boa and spot clean as needed.

Lastly, do you have some pictures?