Converting PUBG ADS to Kovaak's

[chX]

Hey guys, just wondering if I'm doing this right or making some kind of mistake because things still feel a little off, but I'm wondering if it's actually correct and just a placebo thing.

Admittedly a lot of this FOV and conversion stuff goes over my head.

I'm just trying to convert my ADS (red dot) sensitivity from PUBG to Kovaak's. Originally I got my PUBG sens from converting my CS sens, like so:

 

Then I converted the PUBG ADS sens to Kovaak's but still using 90 FOV (106.26 technically as I'm running 2560x1440).
This came out to my original CS sens which I guess makes sense to me (no pun intended).

 

But then if I wanted to actually use 70 FOV (which I believe is the ADS FOV in PUBG down from 90, at least that's what the "Actual HFOV" part suggests to me):

 

 

 

Would this all be correct? Something still doesn't feel right as I mentioned before, but am I doing this right or making a mistake with my conversions?

Appreciate any advice, thanks guys.