Case for delay timer relay module (housing)

This is the case for the timed relay moduled that i will use to build my DIY spotwelder. I won't use the bottom part because i'll have a dedicated box on which i'll fix the module, nevertheless the case is potentially "standalone".
I've purchased the module on bangood, this case is for the [3-4_connections](https://www.banggood.com/custlink/mDvDYc3Uev) and not for the [3-3_connection](https://www.banggood.com/custlink/DmDGhcDUBZ) (which is also more expensive). If you don't want to wait you can purchase the same module on [Amazon](https://www.amazon.it/Temporizzato-Akozon-Temporizzatore-Ritardo-Commutazione/dp/B07H5PHMBQ/ref=as_li_ss_tl?ie=UTF8&qid=1548690525&sr=8-90&keywords=relay+timer&linkCode=sl1&tag=tg-12-thing-21&linkId=53e206c6142842569f1b2345c8bdc430&language=it_IT).
It's easy to print, no need for supports or other settings. Also the material is not that relevant.

Ps: for safety reasons i've decided not to have exposed electrical screw terminals (220V could/will be quite