Tested the new soldering iron today. Swapped the 490R in my SG Special Faded for a 57 Classic. First I did a (from now on obligatory for my guitars...) magnet flip and then I put it in the guitar.
Damn, the iron is SO much better than my old one. Removing the pup covers took seconds, and unsoldering the 490R was done in a flash. 40W seems to be plenty.