The Omnibots (those mailaway figures) are a little smaller than the regular G1 cars save for Skids (misconception about Skids: he's a minivan. Us Americans had seen compact cars, but not the City Turbo.). Yet Downshift, Overdrive, and Camshaft all had "battlemodes," where a part of the car flipped out and a weapon could be displayed. The appeal of Overdrive, already a red sports car, he had WINGS that flipped out, so that made him one of the first Triple Changers (well, along with Tracks) even though neither is designated as such. I had Overdrive and Downshift; I wouldn't get Camshaft until literally a year ago when I was full on collecting and realized "Hey, I don't have the 3rd mail away Omnibot."

I thought Overdrive was pretty cool but, looking at him now, he's kind of a flimsy bot. Or Flimsybot (tm). Somehow he stayed together over the years, but I lost two of his three weapons. When I got Camshaft out of the need for completion, well, I was disappointed. He was a little hard to transform, and honestly didn't look that cool as a robot. Plus his head pops up and doesn't stay up; I had to rest it against the missile in the launcher directly behind his head.
Downshift was always a solid figure compared to the other two, and I don't think he gets the love he deserves. His transformation is not unlike that of G1 Wheeljack, and his hands can actually hold things!
This gave me an idea for a custom, of course. And a theoretically easy one...