I grafted one and planted it early last year.
I started the seedling rootstock in late summer.
It grows really fast. Went from 1.5ft to about 5.5 feet in one growing season.
Would have grown more but I tipped it so now it has 4 main branches
This is one of the cases where I'd say save the money and get a 3 gallon.
I'd do the same for a VP mango, banana, or mulberry.
In Either case, I'll keep an eye out for bigger ones