Because I don't want to stress or break something, I always use the instructions when transforming something, and for something particularly intricate, I may watch videos of the transformation. That said, I agree with MP Rodimus - everything has to be aligned just-so - and RotF/DotM Leader Optimus - getting the arms and chest transformed into truck mode requires more than a little patience (although the lack of spring-loaded blades on Jetwing Optimus made it a bit easier).'07 Leader Megatron nearly had me the first time I transformed him into space cruiser mode - I had to look at Seibertron's gallery to figure out how to transform the legs correctly.