x2. This.
Some females can stay small their whole lives. Ive heard of ppl having old females that are only 1200 grams. They still give them a healthy smaller clutch most years but the snake just wont grow any bigger. Theyre petite lol.
And a female wont breed until shes ready to, aka sexually mature. Even if you can get one to 1500 grams in 2 years doesnt gurantee theyll go for you.