I'm not of much help regarding the costume construction but I can say that I dig this idea! It sounds really cool/unique and still recognizable! I can't wait to see photos if you decide to do it!
Masamune Date - Sengoku Basara
*~Next con I'm attending~*
FIN Chibicon (9 November 2013)
SAT Ryūnosuke Ibuki - Hakuōki: Shinsengumi Kitan