So I have 2 Romans Inception hilts to build, one is for a customer the other is my own.
So I have currently made and had printed the battery holder. I designed it in 2 parts for the purpose of either using a single 18650 or a 7.4v 18500 twin stick. Having 2 parts is essential because of the nature of the way Roman has designed the hilt. It also means if you are only using a single battery you will save money and have the choice of where you want the battery placed if using a single. I have not finished the board and speaker holder yet as I will be fitting a cf&pc into the 2 sabers, this means I will have to do some machining as the boards will not slide through the small access in the rear handle/booster section.
Sorry about the poor video
If there is enough interest I'll make the parts available for Shapeways.