Just like the title says. I’ve been looking into it and I’d love to know which yo-yos u guys and girls have tried. Specifically I’m talking about gap width.
El mijo can have 3 different gap widths by changing 3, 4, or 5mm wide d-bearings, and has a fixed axle blank.
The JPLSolutions LoopUp has a continuously adjustable gap. It is probably what you are looking for since it is the most customizable in terms of gap width. YoYoFactory Loop 2020 is the most customizable overall, since you can change the starburst, axle, and spacers. Both are good options.
Loop ups are going to be what your looking for.