I want to reboard ceiling about 12 X 8 ft,and have purchased 8 X 4 boards.These will need to be cut down to clear narrow stairs,maximum size of around 800mm.Would it be advisable to use panels of 32" X 4 ft.I reckon I shall get by using about 9-12 of these panels.Am I being too ambitious with boards of this size.I plan to screw to laths and joists,and them to nail to joists once boards up.