I just did Waffle's mod and it is great. Only problem is V Cube 5x5 screws are slightly too wide, and rub up against the core. Now I've got to dremil them to hell to make the cube perfect. I think it's largely only a few of the edges. If you look at the rivets some of the screw heads are really off center or oblong. It causes a few tiny lock ups. But yeah, find a convenient screw type that you've got plenty of and throw em in there. It's easy peasy and completely gets rid of pops.