Summary

I will use magnets 10mm diameter and 5mm high.
18/02/2020
Added new honeycomb grid (thicker walls)
17/03/2024
I changed the design of the modifier to smaller magnets with a diameter of 5 mm and a thickness of 3 mm. The new files are marked as v2

Print Settings

Printer Brand:

UltiMaker

                                            <p class="detail-setting printer"><strong>Printer: </strong>                     <div><p><a rel="nofollow" href="https://ultimaker.com/" target="_blank">Ultimaker 2 Go</a></p></div></p>                                                                                <p class="detail-setting rafts"><strong>Rafts: </strong>                     <div><p>Doesn't Matter</p></div></p>                                                                                <p class="detail-setting supports"><strong>Supports: </strong>                     <div><p>No</p></div></p>                                                                                <p class="detail-setting resolution"><strong>Resolution: </strong>                     <div><p>0.2mm</p></div></p>                                                                                <p class="detail-setting infill"><strong>Infill: </strong>                     <div><p>30%</p></div></p>                                                    <strong>Filament:</strong> real PTE-G                black

yongnuo, godox modifiers system