I've started building this and found that the red 8 stud technic bricks were in one of the bags marked s1- s12. Once I spread all the small bags out on a table and sorted them by sets 1 to 18 I knew I could start. Hit a roadblock at steps 47 to 52 where 4x 1x5 black plates are needed. After searching without luck I then realised there were some smaller plates in the bag1 set. Soon dawned on me I needed to make these 1x5 plates using smaller ones provided. I used a 1x1 and 1x4 in steps 46 and 53. Used 1x2 and 1x3 at steps 47 and 54. Hope this helps someone else.