THank you all for the info! - one more question (pardon my lack of knowledge here ...) but what is a "bit" - or Charbit, or something like that? -

cuz someone earlier in this thread mentioned how the bodies of Microsizers and ZipZaps dont' fit on each other, but they seem to be exactly the same size - am I missing somethign here? - even the cuz I know I've seen something that is even smaller than Micorsizers - are those the Charbit? - or whatever they are called?! - arg!! - so confused... too many questions - -