I used the instructions (which weren't very helpful) and it took me 46 minutes to transform Jetfire (although I was interrupted a few times by Yukikaze )! Just so fiddly -- and figuring out what to do with those straps took a while too (because the instructions are totally useless in that department).

roller: z0MG! SALTMAN-Z!! You must bring that next time you attend a Syd meet!!!