Thanks for giving it a try! Yeah, the lower wedge seemed like something that might be troublesome. I've never used Cura, only Simplify3D and KISSlicer. I printed mine using Simplify3D, and I used custom placed supports (which I believe Cura doesn't have?) to give it enough surface to print properly. I also added a screenshot of my S3D support settings in case that might be of help.