Woah, I can’t believe I haven’t stumbled across your site before. The stuff you’re doing looks fantastic and the level of control/customisation you’re allowing (as well as the process involved) is something that I’ve never come across until now.
I should note that yo-yo is the ‘bird’s nest’… I made it in 2008, it is modeled after the ‘bird’s nest’ stadium they build for the Olympics in Beijing.
It’s a placeholder for many, many other designs that I’ve worked on/developed over the last 10+ years.
I can’t say I’ve gone around swinging them full force into concrete… but yes, they’re durable. Worst you’re likely to do is pop a ring out (would take some really hard hits), which can just be put back in.
3d print consistency is good, there are occasionally some surface blemishes, but nothing that impacts performance. It’s plastic, so you’ll sometimes get a very minor vibe to it, but even that is rare.
The machined stuff is extremely consistent, as with any machined yo-yo.