The dividers should be attached full length, either lead free soldered or welded. The problem now will be that you have sugar and niter under the divider and neither will work good. On your dividers did you bend a 90 on the bottom when you made them? If yes, you can try to clean the top surface of the bend and the adjacent portion of the pan bottom, then use a good quality flux for SS and use silver solder. Solder it using a soldering iron. You might that way be able to get it to work. The main issue will be that the bond will only be a top coating from one to the other and will have little if any bond between the divider flat bottom and the mating pan surface. Unfortunately that would have been much easier when everything was new.
Dave Klish, I recently ordered a 2x6 wood fired evaporator from A&A Sheet Metal which I will be converting to oil fired
Now have solar, 2x6 finish pan, 5 bank 7x7 filter press, large water jacketed bottler, and tankless water heater.
Recently bought another Gingerich RO, this one was a 125, but a second membrane was added thus is a 250, like I had.
After running a 2x3, a 2x6, 3x8 tapping from 79 taps up to 1320 all woodfired, now I'm going to a 2x6 oil fired and a 200-425 taps.