It's exciting to see progress even if it's just 5 parts coming together over the course of 2 evenings. I was able to get the second (and final) gable dormer assembled and placed on the mine roof. For whatever reason, I put this on long term hold while I worked on other projects. I usually do things like that when I am faced with a challenging bit of construction, or when I don't know how to proceed. In this case, I think I just really didn't feel like fighting with geometry!
Whatever my reasons were, now that I have this part behind me, I know that shelving the project was foolish. It looks good in my opinion, and even if it isn't as perfect as I would like it to be, it looks better than an unfinished structure.
I guess my point in all this rambling is that while your models might have some flaws, finishing them is more important and rewarding than having a shelf full of unfinished or even worse, unstarted kits.
Go build something awesome.