There should have been posts for the bottom and silver spacers for the top.
I have the spektrum in all my nitros. I bought two dx3.0's and they came with 2 receivers each so it worked out well.
I just put the ofna throttle mod on my mt2. I had been running it with the stock setup but the ofna mod is smoother. Its shown in this link http://www.kedar.itgo.com/tipz.html#steering
You'll need ofna parts 10725. check out nitronutzz on ebay for to order them. Rob is great to deal with.