Having some challenges getting a model built for the Holiday Coro 18 X 9 Matrix. The sign is wired Pixel #1 top left (as viewed from the rear) down the first column back up the 2nd column, down the 3rd column ect. 144 pixels. Single string (with power injection zig zaged). Finally got a model that looked kind of correct but does not handle the zig zag. looks fine in Nutcracker but when you export to LOR the first column is correct but the 2nd column is upside down Third OK 4th upside down etc. etc.