Thinking about it, along with my EP-5's, the next favorite would be my 302 Atlantic:
It was cobbled together by the repair guy at an LHS, being the 4-piece metal boiler with a plastic tender (never cared for the sheet metal tenders.) It's been my only link coupler Flyer, I keep thinking about changing the tender trucks to the cast ones with a knuckle coupler and changing out the trailing truck for a later one, but never seem to get around to it.
Rusty