I just got some new CAD software so I figured I’d mess around with some yoyo design for a bit. This is what I came up with after about 45 minutes. I didn’t really put any technical thought into it (specs and performance), but I think it looks kinda nice for a bit of knocking about.
Needs a bearing. Actually, it looks pretty good. Are you going to materialize it ever
I can see it now:
The Henderson Yoyo Company
Has a really fancy name to it 
Yeah, I know. I just faked it for now until I tweak it to fit standard bearing/response/axle. I doubt I’ll materialize this exact design, but it’s definitely a proof of concept. Hopefully some day I’ll get something produced, that would be super cool.