1. LED Module I'm pretty sure
2. They don't offer it as an option so I'm gonna say no. You can always ask though!
3. Yes in theory you could. Though you'd have a very unwieldy staff, being as there is no symmetry
4. In theory you could, you'd have to email Deep to confirm this. Is there a specific reason you want one half Dark Initiate?
5. The MLS unit only fits in certain hilts that are made for it - if this uses an LED module, you should use the LED module.
6. It is not included with the price. For the V3 hilts, if you want sound you HAVE to get the Li-ion setup. If you only want it as a stunt saber, you don't need the Li-ion setup.
7. I don't know anyone who has the V3s yet, but I know there are probably a few people here who have a Dominix V2 and an Initiate V2, so maybe they could post pics of that...
Hope this helped!