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It's weird because they share so many parts, but twin twist feels much worse than topspin. His feet have a really weird angle to them that almost forces him to stand with a pelvic thrust just to not tip forward, and his treads hanging all the way back doesn't help either. They're also unpainted on the inside, which looks pretty meh. Topspin is probably my favorite TR mold so far, so I figured twintwist would have been a shoe-in too.
Misfire is the complete opposite though, it's like he's triggerhappy with none of the robot mode clunkyness.