Yes, this method is superior to any other as it makes the hipfire sensitivity identical regardless of conversion method. It's not possible for all games though, but if you can match it do it.
You've probably already done it, but note the config FOV in the output that shows you what you need to configure to get the desired FOV. For Apex you also have a "Config File FOV" option under aims that will show you the exact config file FOV which is 100% accurate. The in-game FOV slider is very inaccurate.
