Hope that change in size works out you. Sounds like it will.
I believe that each snake has their own set of rules on feeding. With the exception of DNA, which is why some snakes are significantly larger than others, as seen in the wild.
For example, I have two sibling Coastal Carpets. Etta, will eat half of the food in half of the feeding frequency than Mack. She is 6 feet in length. Mack who consumes double at twice as often is twice the girth at 7 feet long.
On the other hand my Boa, Punch is getting half as much and half as often as his previous owner fed him. He has a great disposition and is never cage aggressive due to a being hungry.
My BP, Elvira must be fed way larger than normal prey associated with BP's to stop cage aggression, and only fed monthly. Yet she fasts every winter.
Of course my other snakes can be quirky at times as well.
The point is, as snakekeepers we need to learn to read our animals and be willing to safely experiment.
Lizzy, Coastal Carpet