I don't speak out of experience, but I believe that all parts from ORIGINAL Bit Char-g's will fit on ORIGINAL Microsizers. I say original because clones are a different thing, not always all parts are interchangeable with Bits. Plus, Microsizers is just the american marketing name for the Japanese Bit Char-g's. That means they didn't change anything when it comes to engineering and parts size or stuff like that, which is what really matters

. Someone correct me if I'm wrong