Summary

If your cube pops frequently... don't use it ^.^" (or modify to fit you rubik yourself)
I'm using Dayan Lingyun (III) and it never pops.

Rubik belt mount
https://youtu.be/iNTrZaO57oU

Rubik mount on a belt
https://youtu.be/N-AazWSYb-E

CAD file on onshape :
https://cad.onshape.com/documents/87e9bdfbc788e10ad5a8d48f/w/172e9cb0f70be73d97a03e04/e/d37d50d35cc2438748919bce
remix if you need :)

Print Settings

Printer Brand:

RepRap

                                            <p class="detail-setting printer"><strong>Printer: </strong>                     <div><p>Mini Kossel</p></div></p>                                                                                <p class="detail-setting rafts"><strong>Rafts: </strong>                     <div><p>No</p></div></p>                                                                                <p class="detail-setting supports"><strong>Supports: </strong>                     <div><p>Yes</p></div></p>                                                                                <p class="detail-setting resolution"><strong>Resolution: </strong>                     <div><p>0.25</p></div></p>                                                                                <p class="detail-setting infill"><strong>Infill: </strong>                     <div><p>20</p></div></p>