I was commissioned a little while back to work on this. The first one I made as a large bearing, and vibed like mad, no matter what I did. I decided to give it a shot using a ‘D’ size bearing. Turned out fantastic. Weights in right at 65 grams with the weight rings.
I decided that since this was a wide yoyo, it should have wider hubstacks, so I made a set that is longer than stock. I also made the center hole smaller like I do on my Ricestacks, and beveled the stack where it goes towards the hole in the middle.
DV8ish stack on left, stock YYF stack on the right.
Out of curiosity, did you give the first one a shot without rings? I find that mine is much more forgiving without them. And what are you looking to do with the botched one?