I did a little looking into the twin seed. I'm not really sure this is a polyembryonic situation, because it's actually conjoined seeds. But interesting nonetheless.
From one of our other seed
sponsors, this was posted:
TWIN SEEDLINGS
This mutation is very common. Polyembryonic seeds contain more than one seedling. Once germinated, it will produce two taproots instead of one. If carefully handled, these seedlings can be successfully separated into two plants.
Strangely, one of the two plants will be a normal offspring of both mother and father. The other plant could be a descendant or a clone of the mother.
Three-seedling polyembryonic seeds have also been reported.
And from another online source:
Despite its interesting biological marker and outcome, there is no real advantage to breeding plants with this trait. No effort has been made thus far to develop a true-breed with these characteristics.
Some cannabis seeds (polyembryonic seeds) can germinate two plants. Technically, this is a phenomenon known as polyembryony. This happens just as in the human species. In this case, however, one plant will be normal and one will be a clone of the mother.
Like with human conjoined twins, you cannot separate these seedlings too early. They can be separated when they reach between 20–25cm in height. This phenomenon should not be confused with so-called “Siamese twin” marijuana, which is a mutation in which two plants share the same root.
Maybe better root ball? Dunno I'd love to give it a try though. 
Very cool pics too. The idea of having two major Veins is awesome no matter what. It would def create a unique training opportunity.
triple threat 
