Bit late for this thread but pictures look really good. As a matter of interest I always cut walls a couple of mm short, gives a much better 'line' and allows a little buffer zone should the ceiling or plastered corner be a bit iffy. On some really bold feature walls (reds/blacks etc) I've been known to run a pencil flat along the ceiling (steadtler Noris school ) marking the wall, these pencils are 6mm wide so the line will be 3mm down from the ceiling. Gives a good guide. It always looks to far away as you're doing it but once you step back I guarantee it looks very smart.