I glued on the rest of the porch pieces (apart from the basement trellis). I found that the porch roof, even when seated correctly onto the tabs in the front and back porch pieces, sat well away from the house wall leaving a gap of c 3/16". So after the porch had dried, I filled the fat gap with pieces of stripwood then shaved them down level with the roof after they dried. I found that the gingerbread railing supports were not all the same height, so I had to do a bit of sanding to even them out before gluing on the railing. I also found that positioning the fascia board along the porch top trim piece so that the amount of exposed brackets mirrored those of the front porch piece, resulted in the fascia sticking up too high for the roof to fit correctly. So I had to trim and test a few times to cut the fascia down to the correct height.
For some reason, the kit doesn't include a top piece of trim for the back porch piece, to fill in above the two columns in symetry with the front porch piece. So I painted up a spare piece of door trim and glued it in. I still need to touch up the ceiling join.