Which is the front for the tree? I can't really judge how big the tree would be, but some aggressive pruning w/ image 4 as the front could yield a tree with impressive movement (with the apex in the blurry region at the back). My inclination is that it would be a shohin though, so I'm interested to see the kifu sized tree you're hiding in there.
Kifu is larger than Shohin. My first post says I will probably finish this tree at somewhere around 10" to 11" inches, which as about 3" inches taller than it is presently.
•Shito: Bonsai trees up to the height of 5cm come under this category. To 2"
•Mame: Bonsai trees with height ranging from 5cm to 7cm are called as mame bonsai. 2" to 3"
•Shohin: Bonsai trees with height up to 20cm in height are called as Shohin bonsai. To 8"
•Kifu: Bonsai trees with height ranging from 20cm to 40cm are called as Kifu bonsai. 8" to 16"
•Chu: Bonsai trees with height ranging from 40cm to 60cm are called as Chu bonsai. 16" to 24"
•Dai: Trees with height greater 60cm are popularly knows as Dai bonsai types. 24" to forklift
As far as a front, I have no idea yet, but I will soon!