Nice
And,maybe I am new,but I think it was "Bankai" not Ban Kai.Here an translation of Bankai and Shinkai found into an forum of Bleach:
Shi means Initial
Ban means All, Full or Final
Kai means Release
In other words Shikai means Initial Release.
So Bankai means Full/Final release.
And here's another idea:you can make another version were to shoot by using jets(if don't get it,alike portalgun do)