G3r Cf Help

[SV6000]

Hi guys i am fairly new to this and have purchased a second hand G3R chassis. It came as a complete roller minus electrics but i have taken it apart and cleaned and replaced some parts that were bent.
When i went to put it back together i noticed that the rear plate that bolts to the X-Brace and bolts to the plate on top of the diff i had to flex and bend to lign the screws up. I also had to loosen the rear skid plate screws off ti bolt the rear diff section the bottom of the X-Brace. Is this normal or has something gone wrong somewhere. I have followed the instructions carefully and everything else seems fine. I did notice that there were some slight bends in the rear skid plate and the X-Braces that i straightened out, i am using EREVO Bulkheads.
Also when you mount the rear shock mount to the rear bulkheads is it normal that the bulkheads flex up to meet the CF plate. I mean there is a gap between the CF plate and the rear bulkheads before i mount the shock mount but as you tighten the mount the bulkhead is obviously going to move up. Is that gap supposed to be there to begin with. Should i just buy another chassis.