Is the LCD Digitizer assembly interchangeable?

Hi,

I bought an apple watch sport 42mm off eBay and now i'm trying to repair it myself.

The screen is cracked and the OLED/LCD is also damaged, touch was still working though.

My next step would be buying another cheap apple watch and swapping the lcd/glass and force touch gasket. Does anybody know if this is possible or are any of the units somehow digitaly linked to the rest of the apple watch?

Thanks in advance