Hi Again,
I`ve looked at your pics having downloaded them (We can deal with posting pics at a later date

) and I`ve copied and highlighted some issues which may have caused your problem.
In the picture below (you may need to refresh the page a couple of times to get it to show) you will notice two circles. These concern me as this is damage caused between the parts.
You will also notice two thin white lines. these show the hinge is not aligned correctly.
The white arrow points at a screw that does not look fully inserted.
So not knowing exactly when the parts failed, I`ll start with the two white circles and thin white lines:
The larger circle shows scraping to the hinge plate that I would not expect as the hinge is fitted after the broken part. The smaller circle shows where the locating pin has come out of the hole.
The thin white lines show the misalignment of the hinge to the part they are attached too.
So, a question: Did you accidentally fit the hinge first?, because if you did the hinge has got under the panel and as you have fixed the two screws in place it would put pressure on the diecast panel and it will fracture. We all make mistakes at some time. Not a problem

.
The arrow points to a screw that doesn`t look fully inserted.
When using self tapping screws the best method is to screw the screw in 1-2 turns and then back the screw off half a turn. Screw it in another full turn and back off half a turn again. By backing off the screw half a turn as instructed the swarf (cut metal) is removed so the screw does not lock tight before its fully inserted.
Now what to do?
As mentioned earlier contact CS and ask for replacements for stage 85 and 86.
When the parts arrive, start rebuilding. These kits should just slot together, so at the first sign of resistance stop and post the issue, or PM me to let me know you`ve hit a snag.
Regards
delboy271155
(Derek)
delboy271155 attached the following image(s):
COME BACK GUY FAWKES "YOUR COUNTRY NEEDS YOU"