My main, and probably, only concern is knowing exactly knowing what parts to purchase as I dont want them to go BOOM after conversion!
This is what
I would get...
-NB3 (Unless you want to color change the LED then you'll need to go to a Prizm or higher board. Remember that the NB3 is only 3.7 volts. You can download the instructions for the NB3 on Plector's web site and go through it before buying anything)
-LED Star Board (Tri-Cree or Tri-Rebel. If you just want one color, get two of the LED die that color and the other die your FoC color. If you want a mixed color like Purple for example, you'll need a Red and a Blue for the Purple and a a color for the FoC. Remember that with a NB3 the LED color mixes with the the main color during the FoC event. TCSS and LEDSupply sell custom 3-up Tri-Cree's. LEDSupply has the custom 3-up Tri-Rebels. If you are concerned about brightness when choosing a color combo, check the Lumen rating on the LED die. The proper resistors will be needed on each die. Also, you can use the stock US LED modules that are already in your hilts)
-LED Lens (Use a thin glue to hold the lens to the LED star as there will be a little space between the lens and the top of the module with the stock US LED modules)
-18650 3.7v Li-Ion protected battery (You could go with an 18500[AA size]. The 18650 will have more mAh, but it is bigger)
-Li-Ion 3.7v Charger (Plug in if using a recharge port, base if not)
-Recharge Port (If wanted)
-Speaker 28mm (Premium or bass. It's personal preference.
I like the bass speaker if a lot of deep and dark fonts are used)
-Chassis (Build or buy. Needs to accommodate the sound board, speaker, battery and recharge port if used)
-16mm Momentary Switch (Illuminated or not. Needs the proper resistor if illuminated. Remember if it's replacing a smaller guarded switch the the hole will have to be drilled out. The new switch will have to be glued in place. Use a strong hot glue.)
-Resistors (The proper one for every LED die in the hilt. Use
http://led.linear1.org/1led.wiz to find out what ohm/watt resistors you need)
-26/28 AWG stranded wire (Stranded and flexible. Not stiff wire. Multiple colors help with organization)
-Heat Shrink Tubing (Use on all wire to wire and wire to resistor connections. Do not cover the resistors with heat shrink tubing due to the heat emitted)
I think that's mostly everything. Anymore questions, post and someone will help.