Ronald Vallenduuk: "There seem to be different versions of this set with slightly different parts selections. They all contain set 4026 with another 100 bonus pieces"
Erik B: "The special parts differ with the batch number on the bucket! (Got one bucket from batch 1324 and a 1224) Nice parts though!"
Eric van Horssen: "Bucket contains booklet for 4026/4027. Contains 4 bags, two of which make 4026/4027. The other two seem to differ per batch."