I haven't transformed my Hot Rod. I don't intend to either coz I don't actually play with my toys. But regarding the spoiler/backpack combo...it's not perfect..but it's a HELLLLLLL of a lot better than my takara. I dunno if it's just MY takara rodimus or not...but my Hasbro one is very good. My one actually plugs in and stays in. But when you start to play and fiddle...then yes, the back pack is prone to coming apart. Which isnt an issue for me anyway as, like I said...I only display my toys...not play with them.