Here's a little Ikea-hack from Bay-Area-based Daylight Design that involves the Benjamin stool and a saw. A simple line cut down the middle provides the means to insert Fome-Cor boards for presentations or brainstorming sessions without rendering the stools unusuable.
Three surprising things I learned from this:
1) The cut shows that the Benjamin stool is actually made out of bent plywood, and not particle board with a veneer edge. I figured for sure Ikea would have figured out how to make even this out of particle board. In the past I've accidentally broken a drinking glass from Ikea and I thought that would be particle board too.
2) I didn't realize Fome-Cor was a brand name, this whole time I've been thinking it was "foamcore."
3) The employees at Daylight Design all look like, Dalai-Lama-happy. What the heck are they working on over there?