Giga
Masterpiece
Honestly that should be planted in the ground not in a bonsai pot. Mine is a cultivar that struggles with conformity, yours is too young and regular strobus(very long needles). You can planted it and keep those lower branches cut back and let a sacrifice branch go.
The thing you need to understand is the P strobus are single flush and the needles won't reduce much. It's not like a JBP that can be decandles or is a JWP that already has small needles. Strobus may be the most difficult pine for bonsai there is That pine is a very long term project and even then you may just want to enjoy the tree as a tree rather then bonsai. But hey you can always experiment, Good luck with what ever you decide.
The thing you need to understand is the P strobus are single flush and the needles won't reduce much. It's not like a JBP that can be decandles or is a JWP that already has small needles. Strobus may be the most difficult pine for bonsai there is That pine is a very long term project and even then you may just want to enjoy the tree as a tree rather then bonsai. But hey you can always experiment, Good luck with what ever you decide.