Nothing to share on my own efforts unfortunately due to time constraints...three-month-olds have a habit of doing that...but something cool to share from the greater Proto:48 community.
Way back in Dec 2014, I mused about some neat things that attracted me to this scale and one of those was working brakes on the freight cars to add an additional aspect to the recreated operations.
A modeler by the name of Jamie who's on the Yahoo Proto48 group just shared a short video of a working brake mechanism on a P:48 truck. Pretty neat!