OK, let's take it to a new level with Extreme Torture! Frans gave this one a rather appropriate name. I struggled mightily putting these together. Even with the solution, it often took quite a while to assemble these. Not for the faint of heart! :0) Color restrictions allow for only one correct solution. I made these using 2 different methods to reinforce the pieces. One version has dowels running through the ends with differing woods acting as the separating pieces and one utilizes end caps which also show the color restrictions. Once again, I felt it didn't matter if was shipped assembled or disassembled.