18 mm plank (I think any wook type is good 😉 )
8 mm pin
Shaper Origin
(optionnal) Trimmer or router in order to finish edges
Wood glue
Sanding paper
Varnish
Be aware : it's not perfect !
First I worked on 18 mm plank, Onshape drawing use variables bug I did not tested if if everything is working when you change thickness (= #ep).
Secondly, in my case the little tenon which had to serve as stopper was too short. Maybe adding some marging could be a good idea ...
Except this point I'm pretty proud of the result (moreover for a first "real" project !). A use a router in order to get clean edges and don't forge to varnish to protect it from humidity 😉
Source (OnShape) :
https://cad.onshape.com/documents/6d70c683b69171725f7a36a4/w/db378f684cabfa355a15407d/e/6bd886750361e11a53fb92bc?renderMode=0&uiState=63b31cf3bf71824bba5747fb