Erik,
The part about diaphrams is interesting and timely for me.
Just the other day I was looking at some of my equipment -- most at about the Sunset level of detail -- and thinking about the look of a passenger train on my layout.
Nothing new here but I reaffirmed what I already knew. Of all the compromises on my models -- the biggest is the diaphragm design and -- of course it's companion -- the distance between engines and cars. (To meet my 64 in min radii)
So, it's reassuring to see that even at the upper level you and Key struggled with diaphrams. That said, the ones in the pictures are excellent.
