In Japan, apartment walls are "inviolable" and no nail hole is acceptable. This model uses mini stapler needles(#10) to fix objects on the drywall/plasterboard.
The original idea is from Kabebijin products. ( http://www.kabebijin.jp/ )
In the Customizer, modify "Wire Diameter" (2.0mm - 5.0mm) and "Clearance" (0.1mm - 0.4mm) parameters. "Clearance" corresponds to 3D printer accuracy. Default value(0.1mm) is suitable for UP/AFINIA series.
And use "Testprint" parameter for fitting test. (output center portion only)
I recommend to use stainless #10 needles (on the last image), but it could be diffucult to buy them ( at low price ) in countries other than Japan.