I had to sand mine on the outer edge a bit to make it fit it.
Although damn close, but I have noticed the color and how the light reflect off the rep and the gen insert is different.
I just fitted my gen insert it snapped right in and didn't required any modding at all. It was a tight fit as on the gen where no glue or tape is used to hold the insert.
I also polished and put some grease on the teeth on the inside and then bended the retaining spring to make the bezel tight but smooth turning with firm clicks. I love the result booth feeling when turning it and appearance just to look at it. Gen pearl is unbeatable
and with a gen Tudor movement it runs great and tomorrow I will go and collect the gen leather strap and fabric strap that I ordered from my AD.
this starting to become my favorite watch!