Fathead: As I was saying - the Racer is no slouch, despite the more humble price
Besides the screws, the Blue bits don't make you go quicker. They just make the car LOOK like it could go quicker;-)
I regularly whipped guys with factory teams and team versions. However, I converted it to FT over a year or so, but I kept the carbon shaft. I didn't like the 'less steering to the left' nonsense (the C carrier has more material on it on the left side than on the right!?!) , supposedly designed into the car, so I got my dremmel out. I race indoors on really tight technical tracks - so give me loads of lock ANYDAY!! I don't reduce the throw on my Tx unless the track is laid out more open.
With the carbon parts, the car feels a little more reponsive - but over here in UK we hardly have to worry about high temps
that's probably why the Racer spec can still do very well. The Aluminum screws helped save a bit of weight too. I didn't get on with the composite bones - the pins would bust out through the holes on the front shafts due to the constant lock to lock on our tight circuits. The blue ones are MUCH better, but cost loads. The composite shafts work better on the back and are lighter, so don't get rid of them.