Talk:Ferrari LaFerrari Championship/@comment-118.189.143.218-20161201041259/@comment-28753807-20161202033305

There was a time that I bought upgrades I had calculated from the data on the upgrade page of the car. When I got done, I was 0.1 short! I don't remember what car it was or the circumstances. I guess I upgraded out of the order that would get the PR lift from the upgrades that was published. I guess if your upgrade order is vertical rather than horizontal, or vice versa, the PR you get from the upgrade may vary.

A safe way to do it is to (if you have the reserve ) buy the upgrades in the order you plan to do them and see what you get. If it isn't what you expect, restore from backup and try a different upgrade order, or a different set of upgrades. You have to have a good backup to cloud and enough gold to buy all the upgrades.