The bogie as supplied is a fold up box to which additional end pieces are soldered. I forgot to take a phot of this so I include a snip from the instructions to show what it consists of.

I have some very nice castings in place of the etch parts B6, but sadly as you will see not much of them is visible on the finished bogie.

I built up the bogies frames to create the I section where needed, as with the trailing truck. I also added some rivet strip along the top. Parts 164 are white metal castings which were passable, but I chose to remake them from brass

You will also note parts B10, this is where period photos are essential because these were not fitted until the 1940’s which is later than this model is to be depicted (around 1938). There were location marks half etched into the spring plates so I reversed them to hide the marks.

I have also elongated one pair of holes so that I can provide some basic springing of one axle.

Once it’s all assembled you can see what I mean about the visibility of the springs.