How I've done it so far

1. The bed uses a 3mm MDF sheet which I cut to size in order to fit on my printer.

2. I drew a grid spaced at 1cm x 1cm so that I knew where to drill

3. then I drilled 1.8mm drill holes according to the grid.

4. I inserted 1.75mm PLA filament into the grid holes and then cut the filament using a 0.5mm diameter wire as a spacer so that the filament protrudes slightly

5. The next thing was to set up the slicer (CURA) with bed temperature 25deg and adhesion set to skirt

6. I proceeded to print and it works as hoped, anchoring the model to the bed using the grid of PLA dowels