I’m experiencing some trouble while trying to use the Mask and Trim tool at the same time. I’m trying to make a universal joint (background pic) so I’ve validated a cylinder primitive and trimmed two sides using symmetry. Now I want to trim the top half of the remaining centre part into a semi-circle by using the flipped circular trim tool, but when I mask the lower part it’s still trimmed away. Ive tried playing around with the trim settings, poly count, and the general method, but can’t seem to stop the masked area from being trimmed. Any advice would be greatly appreciated!