Oh, got it! I've just sent a link to the project to the email address available on your website. I could not join the Discord community for some reason. I hope that is alright.
Okay, I think the main issue is that the 3D model object origins are in the corner. If you center the origin in the 3D model (e.g., in Blender, etc., and export again), you will likely need to reposition your models in the layout. Also, keep the bounding box a little larger.