Yesterday I got the Ball Bearings bp from the TT and wanted to put it into my Arkadia component book. But strangely enough I got the message that my book was full... I doublechecked the position for the Ball Bearings bp and it was still empty, as many other slots of Arkadia components. Then I checked how many other bp's were already in that book and noticed that it was exactly 99. So I guess there is a (wrong) upper limit of 99 on the number of blueprints in a bp book. I'll send a support case later today, when I get home from work.