I always do it the exact opposite, usually 6 or so lower when cold lower than what the cam card calls for..IE set at 20 cold if the hot lash setting is 26.
Setting cold is way more accurate. Everything is the same temp. Setting hot, you have to wait a bit just to get the covers off, then takes a while as things are cooling.
Then once set cold, let it get hot and quick check a couple, and see if your 20 cold is on the money or not. If not, adjust accordingly when it cold again. Once you know the hot/cold range( only takes once) your good.
Way, way easier to work on something when it isn’t hot. And way more accurate. If you do it cold, all are the exact same temp, no matter how long it takes you to do it.