Do you have a V1? btw, I have a guhong, lingyun, lunhui, zhanchi and lingyun 2. My current main is the guhong, but when I had a lingyun that modded with screws, that was my main.
No, I didn't do anything to the corners. I didn't feel like spending time on that unless it would make a big difference. I might do that though when i have time. Also, I haven't fully disassembled my Lingyun V2 yet (it came assembled). I didn't see a reason to.