Job: GSigns addon change / fix

Hello, I have a blackboard model that I made for the addon here: (https://www.gmodstore.com/market/view/LSHmFqPaSYGujmTVCvLuPQ) that is vertical rather than horizontal so that it can fit in specific areas of my map. I also changed the size of it quite a bit so that it would fit inside of a frame. I am however having trouble setting it up to work with the addon as I do not know lua. Right now I have it in-game though as seen in the picture, it displays incorrectly, so I am hoping that someone who is decent at lua can rotate it and have it working as intended.