The storefront bits are going together, but not without some problems.
The narrow left edge piece wasn't straight, kinda warped, so I removed it, it broke, but went back together okay and now looks better. The inside of the upper pieces may be visible from certain angles and I thought the black too stark, so I painted them boxcar red like the trim. Placing the other side on this revealed more problems. The four top pieces aren't exactly all the same height, so these will be filed/sanded to fit. The cardboard landing isn't close to fitting correctly. The angled piece isn't 45 deg. The thing is too wide, I think Dario included the width of the walls when he made the measurements. Some trimming/fitting will be involved. The door isn't right either, the top piece is too wide, note the door edges. There are signs to be added to the top pieces, the instructions note to do this when it's all together, but I thought it too fragile for this, so I'll add them next.
The door is attached at a 45 deg angle, one advantage to working on glass over the grid mat.