Hmmm. Maybe I can scare up @baskI have three of them. Two can be adjusted in .1W increments, and this is specified in the manual. Those two also arrived set to wattage mode, also as specified in the manual. The third arrived locked in TC mode, which I've changed according to the advice given to me by Sarah at JAC Vapour. She also suggested that rebooting and applying the service packs might change the adjustment to .1W, as it's supposed to be. That didn't work, and unfortunately she has not stayed late at work to continue slaving over my problem.
He knows the JAC and escribe better than I do. I had the JAC all figured out at one point and once I found what I liked (TC at 430 degrees) I never played with it again and forgot all of it. I got messed up the other day and @bask pulled me out of the ditch but only some of my memory came back.
Seems to me there has to be a way to get that back to .1 increments (seeing your other two JACS are there). Someone will come along and set you straight. I'm sure.