One of the "problems" of today's state-of-the art kits such as the High Level Coffeepot is the sheer number of parts that they contain.
The etched sheets alone have 123 different components listed. That doesn't include the multiples of the same part number, nor the (thoughtfully provided) spare of certain small bits that are added in anticipation of sacrifices to The Carpet God. And it doesn't include the multitude of castings in whitemetal and lost-wax brass either.
So I was thinking that I was reaching the end of the "build" stage and still had a number of components left on the frets. Helpfully Chris provides pictures of the parts and their names and numbers in the instructions. Matching back to these, I was able to eliminate all of the remaining parts as relating to other locomotives in the eight-strong class except these:
The long bits are the reversing rods, which are not fitted until the chassis is mounted in the body, so they were okay. The small bits that look like steps, are steps... I missed the bit in the instructions that said that they should be fitted.
So a quick whizz of the soldering iron, and they are in place on the front of the bunkers.
Next is the trial build stage, to ensure that everything goes together before painting starts.