I have made a start on assembling 2 building kits which I am going to join together to make a terrace of a Post Office and 2 cottages. In the photo below the bottom section of wall is as it comes in the kit. Each wall section has to be cut to size and marked out as in the section of wall in the middle of the photo. Then the door and window apertures have to be cut out. The small piece of wall on the right is an end wall. These 3 pieces will form the 2 cottages.
In the picture below is the 3 wall sections for the Post Office assembled, which will be joined to the cottages to form the terrace.
These are definitely the hardest kits I have ever made. I was contemplating not making them, but I have been unable to find rebuilt models to use in place of them. I have actually found them easier to build that I originally thought.