Neo welcome to the boards(forum).

I can helpyou with all of your questions because I have a nemmi that I have beat the living daylights out of testing a rollcage I'm developing. First I would ask you to look at my gallery for some of my work....

1. I use a center locker after juicing it with 120,000 wt. After running with fluid I realized this truck has so much more power to offer, so I locked and have not looked back!!!

2. Not sure, I have never run one, so can't comment other than opinion, and that is,, Any protection has got to be better than no protection if your gonna beat it, unless the protection has a chance of causing the kind of damage seen below.(not my damage-an image I found online)

3. Again, see my gallery,, I have the full suspension from [link=http://www.hardcoretrucks.com/]hardcore trucks!!![/link] I love them!! great machining and strong. but they will bend(only the steel, upper turnbuckles bent), if you use the full aluminum setup. Thats why I reinstalled the plastic C-hubs, to have a flex point at the wheel. That pretty much did its no more bent arm(I think I got better driving too)

4. 120,000wt

5> yes, my baffles are gone and it seemed to make the throttle more responsive(snappy). sounds meaner too.