I wouldn’t say trouble as much as I just want to make sure it’s right. My first truck turned out (at least I think) pretty good so I knew I could do better. I’ve read quite a few build threads and you don’t often see posts where guys admit they’ve redone something, so my hope is that if someone who’s looking at trying something new reads it, they understand that it’s OK to make a mistake and try again to get it right.
The back of the cab will be layered styrene. The section behind the stamping will be the lower half of the cab only and go between the sides of the body to provide side to side support and the piece with the stamping holes will attach to the backside of the cab. The last truck I did had both pieces attach to the back and while it held up, there wasn’t anything to support compression on the sides of the cab, ie a rollover or something. Something I’ve learned from my first go-round.
For the rear window, it definitely won’t be left open. What I did on my last one was used the windows from the topper and cut them to make one rear window, glued the pieces together, while making sure the joints were placed where the slider supports were so you never saw them.