Took me about 40mins to map on Excel using conditional formatting. The one we have planned for Brighton (if we do it) took a lot, lot longer and will look outstanding if we pull it off.
Took myself and one other 2 hours to map out the yellow outlines on Thursday then yesterday we had 30 helpers from the Swedish Mags group who helped blast the display out the water in like an hour.
We then stayed back to refine some bits and tidy etc.