Summary

My printbed (Bambu P1S) would not allow me to print the 3x3 grid in the original thing.
With help from my "Buddy", we modified the 3x1 to have gaps on both horizontal sides.

Now I can print the 6x5 grid for the base game using the following files:
2 x Five_Tribes_Large_A2 - corners of the grid.
2 x Five_Tribes_Large_A4 - opposite corners.
2 x Five_Tribes_Large_C1_Mirrored - in the middle of the overall grid.

Hopefully the picture shows what I was going for.

Print Settings

Printer Brand:

Bambulabs

                                            <p class="detail-setting printer"><strong>Printer: </strong>                     <div><p>Bambu P1S</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>No</p></div></p>                                                                                <p class="detail-setting infill"><strong>Infill: </strong>                     <div><p>15%</p></div></p>                                                    <strong>Filament:</strong> Bambu PLA Tough                Grey                    <br>                        <p class="detail-setting notes"><strong>Notes: </strong>                    </p><div><p>I set my print bed to 65% otherwise I sometimes get part lift.<br>I set the Aux fan to 20% for the same reason.</p><p>My printer is in a cold garage (~40-50 degrees F) but enclosed.</p><p>The pieces don't snap together perfectly but with a little force they'll click and stay in place.</p></div>

How I Designed This

We took one of the original 3x1 files and cleaned it up (had non-manifold edges errors) then mirrored the side with the gap so both long sides have gaps to be hooked into.

Five Tribes Grid 3x1 Double-Sided Gaps