Zug: I took Balt as meaning the number in the reporting marks on a car; not the number of cars.[;)]
But thanks for that diagram and particularly the: “Extra bonus point: if the car has two handbrakes, then the piston extends towards the “B” end.” I had thought that but wasn’t sure and hesitated to bring it up. That’s really kind of handy as the cylinder has a tapered end that indeed “points” to the B end. Kind of frustrating though when you have to pick up a model Pullman to figure out which end is which and find that its underbody detail is lacking a brake cylinder.
Strange that axles are numbered from the B end. Using my analogy of the A end being the front, I’d have numbered the axles from the A end. That just seems more logical to me. [sigh] Another illogical detail to keep track of. [*-)]