Shower drain replacement

A replacement part for my broken shower drain. This drain diameter cannot be found in any place so i decided to design it by myself.

This part will live in water so i wanted to print it in ABS but i had too much warping even with my heatbed so i finaly printed it in PLA. I don't know how long it will remain before it fall apart.

I publish the SCAD file and the STL. In order to open the SCAD file you will need this thing:
http://www.thingiverse.com/thing:2005162