Hi Anwar ,

Few more upgrades are now available with Joe which I got recently.

1. HN6051   Gyro Mount
2. 2 MM CF frame
3. HN6068   600N Metal Main Shaft Bearing Block
4.  HN6066   600N Frame Brace Set(CF)
5. HN6060   Metal Engine Fan
6. H60027-1   Metal Aileron Lever
7. H60025-1   Metal Elevator Lever
8. H60005   Metal Head Stopper
9. H60081   Metal Main Rotor Holder
10. H60093   Metal Flybar Seesaw Holder
11. H60128-1   New Carbon Fiber Tail Blade
12. Rotor Head Upgrade Assembly HN6074
13. RCE-G600 Governor RCE-G600

To anyone buying a new Trex 600 Nitro Pro, the must have upgrades are still

1) Metal fan

2) Metal main blade grips

3) Gyro mount (actually there is an upgraded canopy holder with the gyro mount, that is the real important piece, since it prevents your CF frames from breaking).  I have experienced this myself.

These  are known to cause issues during flight in some cases  with the default parts (fairly rare, but still possible).

The others are "nice-to-have"s and "bling"s !

Anwar.

My personal opinion is that the 3 upgrades in my last post are the really important ones.  Unless you are doing a lot of pitch pumping 3D, you shouldn't need the rest. 

Also, the metal parts in the head (see-saw holder, aileron lever, elevator lever etc) would also need to be upgraded if you are not careful in the initial build using the plastic parts.  If you over-tightened and messed up the threads on the plastic parts, then it is a good idea to upgrade to the metal parts.  Otherwise, the stock plastic parts are quite sturdy enough.