Nice work!
Yes, the species can take very large prey without being over fed. As long as ample time to digest and clear is taken, larger prey, within reason, is not anything to worry about.
The true survivors in nature get off to a good start and make their way to larger prey before the slow starters. The males that eat bigger, in theory will have the advantage in combat mating rituals because of their size. There are so many incredible photos of wild carpets stretched to the max because they took a huge meal. But there are no FAT snakes in the wild, at least I have not seen any photo evidence of it.
All that said, I fed Kevin prey that weighs less than his large rats yesterday. I fed him quail, but the gape required to ingest something like a quail is crazy by comparison.
I like variety and that was his first sample of avian prey.
I think you will see nice, steady and impressive growth this summer for your carpet crew!
Nice picture.