Small and effective endstop holder for x and y axis...
Designed for 8mm smooth rod...

It is a simple print, no need for supports or rafts....
It works with m3 small screws...(around 20 mm lenght)
It is a little tricky to put it on, but once it is in place it is very stable (does not move)
And it was printed with green ABS, but PLA should work also, haven't tried though