Check out this island tub drain fitting by @OSBPlumbing

OS&B link :

https://osb.ca/products/downloads/OS&...

Baby come grinding attachment by @calidadtools

Calidad link:

https://calidadtools.com/products/cal...

Tile Leveling clips @Raimondispa

Raimondi link:

https://www.raimondispa.com/en/rlsle...

This is not a sponsored post. These are the products and or tools I choose to use for the best possible installation.