I can see where this type box might have caught on, especially since it was only an inch deeper than a standard medium.
I wonder; if they had used a standard 1x8 if it might have made a difference in popularity since the true measurement of a standard 1" X 8" is actually (3/4 x 7 1/4) inches, only 3/8 difference in the Illinois box. If they had made it from the standard
(1x8) / (3/4 X 71/4), The box builder would not have had to rip the board to the proper width. The board would be standard width from the kiln saving a lot of ripping. (Just food for thought)....
Jim 134 did your friend use wood for a heat source while using the steam method during his wax melting? I see that Les uses wood as a heat source as well as does Tim Rowe, getting the water/steam plenty hot...
Phillip