How to centre a wall mount for a 65in Oled ?

[pasulli48]

Hi. 

I have the 65in A90j oled On per order. It has standard vesa mounts of 300 x 300 so know I can get a variety of wall mounts. However the Oleds are wider at the bottom than the top and the vesa mounts look lower than bang on in the vertical centre. How do to figure out how to place the wall mount when it is lower than centre? Thanks 

[mhallqv1st]

I mounted it to the tv first and then measured screw holes to bottom of tv. By the way, a lot of the mounts that are spec for vesa 400x400 fits 300x300 just fine.