Wishing you the best of success with those! I reared a bunch of C. regalis many years ago. The caterpillars grew fantastically well, but I ran into major problems in the pupal stage - must not have gotten some aspect of the set-up right. Undoubtedly, there are people on this forum who have much more experience rearing this species than I do. Eacles imperialis, which is also a member of the subfamily Ceratocampinae, is equally impressive.