You mean the support of the plate at 90 degree from desk surface instead of the current 60? I could do it but I will have to adjust a bit the desing to make sure it does not tip. What length?
Did you try to use the link in the description?
Then create a new sign by clicking on “Create from Blank” then set the size as specified in the description, add your text, click download and select Doneload 3mf. Open in Bambu studio and print.