Sanitize Carb Stone Day Before Brew? (UniTank)

We have always assembled/sanitized our carbonation stone setup on brew day and let the stone sit in boiling water for 15 minutes before putting it in the tank and running the sani loop.

We would like to switch to assembling/sanitizing the carb stone assembly the day before.

Is there anyone that does their carb stone setup the day before? I wouldn’t mind spraying the carb setup right before sanitizing the fermenter on brew day, but maybe that’s not even necessary?

Also - is there a “better” way you’d recommend approaching sanitizing our carbonation stone setup?

The worry is that if we assemble/sanitize/put it in the FV the day before, and that if it isn’t filled with beer the same day, that there’s more risk of it becoming a potential contamination point.

Thank you!