I received my Gungi kit from Force Relics a couple of weeks ago but just now got a chance to do an install on it.
I went with a single 18650, CS and GGW Rebel.
The kit is great and although the switch can take a little finagling to get in it wasn't that bad. It is well designed and well made. The only change I would have liked is for the recharge port to be a screw in type just because I do not like to see the recharge port nut on the outside of the hilt.
I still need to PC the blade holder and pommel but that will have to wait a little bit.
Here is a video...
Here are the pics (click for larger images)...