I just tried the solution described in Warped Bed Question - #16 by minaskar for this exact problem and it worked like a charm! I now have a significantly lower Heightmap range in Orcaslicer, resulting in less scraping in the corners. I used the F3D file from Jig for Silicone Tube Leveling for Prusa Heatbed by motocoder and changed the length to 14 and 16 mm, use 16 the mm version if your Heightmap range is more than 0.8 mm to prevent bottoming out.