I've spent the last 2 days building these pilot models for my friend at Southern Car and Foundry.
They are 3 compartment tank cars on the Standard Tank Car Co. underframe.
The kits feature the usual high quality resin tank castings as well as underframe components we've come to expect from SC&F. One other new feature are hangers for AB brake components. The first set of tankcars from SC&F came with mounting brackets for K brakes only.
The models you see here are not complete yet as there was a little hiccup with casting the new parts, so I've taken the cars as far as I can and expect to see the errant bits by Friday. Fingers crossed.