I bought one of these not too long ago from Ovrcahst and after doing this install, which was the biggest pain in the ass, I'm glad I did buy the one from Him..anyway this began when I bought that one and showed it to a couple people, and then they wanted one for thier mantle.
So lets start with the spec's, It features a NBV4 w/pex RGB tri cree XP-E2, 3000mah 18500 battery, 27mm railmaster hi bass 8ohm speaker, and a 12mm RCP, and a small tactile switch in "clamp card" area.
The challenge of this build was that basically at the mid section of saber where the body ends is all you have for your install, the threaded area of the middle of the saber is you heat sink, then to add insult the speaker vent is not in the pommel but the lower section of the body. and then comes pre drilled for a switch where I put the RCP, lets say its super tight.
On this part I wish I took pictures, but I had to make a chassis using a 1 inch section of thinwall blade tube( no 3d printed chassis would work on this) , it works great beacuse it securly fits into the bottom side of the middle section/led heatsink, and then I mocked it to fit the battery, and notched so the Nbv4 could but attached on the battery, drill hold through for the switch and Rcp, Once I tested it all, I hot glued it in place and heatwrapped it. I used some nice foam padding to make it snug in the hilts body(1.10 in the hilt), lastly I had a 1.10 bass speak holder 3d printed in my inventory and just ran the speaker wires forward, with a quick connect to allow acces of SD(need long tweezers lol) By pulling the speaker out, I have about a perfect 1inch gap between the speaker and the back of the battery/chassis/soundcard assembly. I made a brass mesh insert to hide the wire from the speaker going forward and give it some flare.
Lastly was the switch, I had some left over tactile from my Count build so I just drilled a hole, mounted it and hot glue it in place, the other hole is so you can unscrew the switch box if necessary, i'll be filling it later with a trim brass rod, to look like a switch, I just ran out.
All in all on this build It was a challenge, I had fun, and Im glad I bought mine with a prizm already installed, I'd of dreaded making that card work in this lol.