A "The Other Half" backplate for Jolla phones. This version has studs similar to LEGO ® blocks that allow blocks to be attached to the back. Although the attachment isn't as strong as the real thing, it will nonetheless allow things to be attached.
For more details, check out the website.
A new version is currently being tested to improve the fit on the phone and attachment of blocks. The new design will be made available once the test print has been checked. Please contact me if you'd like to know when it's available.