A "The Other Half" backplate for Jolla phones. This version is 0.5mm thiicker than the original.
See the images for an idea of what this means in practice. There are a couple of cross section renders with this new thicker model shown above the original with a 1mm grid.
This is an experimental model and I've not yet seen an actual print myself. Please bear this in mind if you order a copy yourself (I'd be interested to hear your thoughts if you do).
For more details about the full series of covers, check out the website.