Summary

Sliced with Prusa slicer 0.2mm for all layers with a brim - takes around 50 minutes on my printer - the original upload did not have a flat base - the GS208V2 bracket reworked2.stl file now does - original deleted
I have added a magnetic version that requires 3 10x10mm cylindrical neodymium magnets - print with the 3 cubes on the print bed and apply tree supports - it needs a lot. Pause at a suitable layer ( 62 on my settings ) to insert magnets then resume.

Print Settings

Printer Brand:

ELEGOO

                                            <p class="detail-setting printer"><strong>Printer: </strong>                     <div><p>ELEGOO NEPTUNE 3 Plus</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>Doesn't Matter</p></div></p>                                                                                <p class="detail-setting resolution"><strong>Resolution: </strong>                     <div><p>0.2</p></div></p>                                                                                <p class="detail-setting infill"><strong>Infill: </strong>                     <div><p>100</p></div></p>                                                    <strong>Filament:</strong> Elegoo PLA                green                    <br>                        <p class="detail-setting notes"><strong>Notes: </strong>                    </p><div><p>printer is Neptune 4 - not in the list - printed bracket works but could be a little deeper and have a higher front arch</p></div>

Post-Printing

                <p class="detail-image"><img src="https://cdn.thingiverse.com/assets/32/9d/cf/31/7d/89725131-70d6-4ba0-b720-3cc399351279.jpg"></p>                <p class="detail-image"><img src="https://cdn.thingiverse.com/assets/59/33/34/42/ad/95416780-ec44-43b0-a360-64d9339ac9fa.jpg"></p>                <p class="detail-image"><img src="https://cdn.thingiverse.com/assets/cc/e3/9b/34/ac/9027ca1f-943a-4ca4-abe5-d099948caf60.png"></p>            <p class="detail-caption"><strong>Magnetic </strong></p>                <p class="detail-title"><strong>Fix to a filing cabinet</strong></p>            <div><p>Three strong magnets allow the router to be attached to a suitable metal surface such as a filing cabinet</p></div>

A bracket for my GS208V2 switch