Note the joint between the rood and the transverse. A peacked roof has been built here to cover a gap caused when the transverse slipped during construction of the towers and transverse. A clever trick but it works. The roof now fits into the detail of the transverse adn towers to tightly that paint will probably make it too large... Some trimming may be required. To make the roof very hard to knock off during a game I might line the bottom of the rood efge with thin felt.