In steps 1-7, the suspension,assembly of the wheels,the rear and front panels,the rear sub assemblies for the idler wheels,the exhaust system, the individual track assembly with the fantastic quick and easy fitting  assembly of the “Magic Tracks”,by the way are marked left and right and sealed in separate bags.The rear and front panels fitted quite nicely,basically everything was an easy fit. A quick suggestion for the “novice”,like me. It is easier to mount the rear panel,and then mount the rear idler wheel assemblies,because in the long run it aligns up nicely. Contrary to what the instructions say.