Thanks for the great overview - My Experiences
Thanks for great insights and pictures. Not trying to hijack you post but I just built the same thing and wanted to add my experiences from my build. The original posters also get my sincerest thanks, there is no way I could have figured this out myself.
First off one has to learn how to actually shop at Ikea, which I did not know how to do. I allotted 1.5 hours to get the stuff, which included entertaining the kid with swedish meatballs. The only way I got through there was I found a great knowledgeable salesperson that was willing to help me out. Otherwise, I would still be there. You can actually print out the parts that you along with their location from home. I learned that after I got there. Additionally, at least in the U.S. there are alot of things that dont exist anymore. Additionally, there are a few things (the capita legs) that are not on the shelves, you have to get someone to print a receipt out for you and you pay for it and collect it at will call.
You need 2 people to do this if you can. The bookcases are heavy, especially when connected. You can easily break the legs unless you have 2 people to straighten it up.
I used gorilla glue to attach the bookcases along with 8 brackets. I could have used another 2-4 brackets, but the 8 seem pretty solid. The bookcases are kinda hollow in between, so pick good long wood screw.
The Ikea person suggested not using the short shelf (laki?) for the purposes that we need it to. Again its hollow. so i am not sure how solid it is. Instead, i just bought an oak plank and used it with the slanted capita leg. It connects very solidly. The other problem I found was attaching the slanted capita legs to the cabinent with the included hardware. The stem just did not seem long enough. I used some extra parts from the short capita legs that I did not use and am able to screw it directly into the top of the booth. Otherwise it turns out great.