I did look see the pictures, but there are a lot of different hilt designs that are going to require different solutions, so I'm just encouraging others to share their ideas, including some that might be suitable for external mounting on the hilt for those that prefer that.
I'm thinking of trying a Korbanth K4 with a Neopixel blade for this build, and while your chassis design is much to wide to fit, it has helped a lot to see the pictures of how much space the micro USB breakout takes in your print (not much!) and imagine what that would look like in a 7/8" chassis. Based on your pictures, I'm thinking that an alternative is certainly possible in either a 7/8" or MHS diameter where the USB breakout is vertically mounted - a slot could be printed right in the back cavity of your main chassis to securely hold the breakout in this position. The detachable speaker section would not be necessary in this design.