The next big area of leakage was around the inset hygrometer. I don’t have any pictures of this, but what I basically did was cut a circle of wood out of a piece of 3/8” plywood, run a bead of silicone along the underside and pressed it into the hygrometer cut out hole inside the box. I then ran silicone along the seam. It got a little messy and didn’t clean up well, but once the humidor is back together you won’t be able to see this anyway.
Not too pretty, but it's fixed!
All of the silicone completely firmed up in 24 hours and then I left it to air out for an extra 24 hours.
For the next week, I put a bowl of steaming water on a small rack inside the humidor and left it overnight. After 7 days of this, I put my sack of shilala beads in there with the water bowl and left all that alone for another 7 days.
The result?
Rock solid humidity at 65% in an empty humidor.
I can’t wait to put my cigars back in there this weekend!
Hope this helps some of you with leaky humidors and limited skills like me!