From Korea's YJ YOYO comes the Canversion (not "Conversion"; possible naming error?). Uses a standard size C ball bearing axle or a half spec size C bearing, aluminum body with plastic side caps.
An uncommon and hard-to-find model now from YJ YoYo.
From the yoyorewind website:
"This is a collectable high-end return yoyo for adult hobby. This yoyo is a returnable yoyo, you can change from the installed size C half spec bearing to a size C full spec bearing and modify to string trick yoyo.
This product made over $5000 USD of crowd-funding. If you need an 'Original-Style Flavor' this is it!"
From the spingear website:
"It is a metal yo-yo with pullback use released by Korea's largest yoyo shop, YJYOYO.
The unique configuration of the aluminum body and the plastic cap, the shape is also adopted a shape close to the classical straight.
The standard C size (thin) bearing is mounted, and it is set back at the last moment.
As optional full C-size bearings and accelerators are included, it is possible to change to bind specifications."