I designed this toilet paper holder for my girlfriend. Simple but slick. You need to print each file once. For the base plate I recommend a 100% infill for stability; I printed the others with 50% infill.
Two M3 threaded inserts and two maximum M3x16 screws with countersunk heads are used for assembly.
I glued the crossbar in place with superglue.
The holes for wall mounting are exactly 7cm apart. This is already true for us before, which is why I chose this distance.
If you have any further questions, please feel free to get in touch. Have fun