I'm using Kal's instructions. The holes are cut and the box is assembled but I'm having a hard time getting the threads to extend far enough for the nut to grab inside the pot. It's like the threads on the element are too short. I'm wondering if the fact that I'm using a smaller pot (7.5 gallon) is the problem - the radius of curvature is too small. Any tips that anyone can think of? I suppose I could try to flatten it right around the hole.