CMOS sensor distance from camera PCB

I wonder if I should correct CMOS sensor position before assembling optical module.
It looks like not perfectly parallel to the rpi camera PCB, which would cause focusing problems on the edges of the frame. The 2nd question is about thickens of the double sided tape used to glue the sensor. Is it ok, or should i remove it and glue the sensor directly to the PCB.
Thank you in advance.

The nominal sensor distance above the board is 2mm, which includes the foam part.

The angle you see is common.

Thank you.