Outstanding work as always, Bernie.
The big reason I didn't just use MTH 2-rail trucks on the UP cars was that the car rides about 1/8" too high. The end sill "bump" on the MTH car should be notched out for the coupler. Even though it appears the prototypes use long-shank couplers, I opted for standard length 700-series Kadees as they'll clear sharp curves and the standard shanks are actually a bit longer than prototype anyway. What's starting to bug me is that the only ones showing up on eBay are priced higher than original retail -- all this to find another BN opera window car.