Sounds like a good decision on your part. Also, I'm not sure what Painted is referring to about rats being "bags of milk". There are no known nutritional concerns with feeding rats at all (and very minor differences between them and mice beyond size). An appropriately sized rat is the feeder of choice among nearly all experienced BP keepers.
Edit: Thank you, Painted, for your clarification. I understand the intent of your post more clearly now.
Oh gosh, sorry, I wrote the first post a bit quickly and it wasn't factual. Giving my opinion out as advice, haha. I apologize and thank you for understanding.