I just get a little paranoid about ingestion of substrate!
That fear is illogical, think about wild Python regius? If you still wish to feed in a seperate enclosure then fine, as long as they eat but you can also expect a bit more cage aggression out of some individuals.
"Out of suffering have emerged the strongest souls; the most massive characters are seared with scars".- Edwin H. Chapin
"When a man is pushed, tormented, defeated, he has a chance to learn something; he has been put on his wits ... he has gained facts, learned his ignorance, is cured of the insanity of conceit, has got moderation and real skill".
- Ralph Waldo Emerson