That’s one of my Classic prepared for 5A.
Such revisions are:
- Elimination of the inside of the caps, so as to maximize the weight in the rings.
- New shape and little lightening of hub
- Increase in the return system
- Enlargement of the gap of 0.5 mm
Now the yoyo weighs 50,60gr against 63,40 of the original, there are no vibrations, has maintained the same stability but has significantly increased its spinn times (using the same bearing, of course)
The work was done with my trusty Lathe Ceriani David 202