Replacement Tub Drain base

Today's project: The Chineseim pop-up replacement drain started to flake after cleaning it with bleach. So, I revisited the old one. I cleaned it and the tub drain too. I found that the post in the old plug had a threaded end. I modified a drain strainer model with larger holes and made 5mm hole at the bottom of the print. Using my drill to hold the post, I was able to thread the post into the 5mm hole of the print. Put it into drain with tap complete the install with a little force with a wooden hammer. Dimensions: 36mm x 36mm x 25mm