Yep, after 3 year absense you go back down to noob level
As you can see though the G3 and G4 are two completely different designs of chassis, you cant swap parts over between the two.
Take the time to read my thread, you will quickly see that the old X-brace design doesnt hold up well to impacts at any kind of speed- cant speak for the new G4 design, but I believe it may actually be stonger and less prone to damage- easier and cheaper to fix if it does bend.