MT 50' cars take forever to lower since the underframe is metal. You need to file and drill a significant amount of metal away. I lowered my first FVM boxcar, and it doesn't take long at all:
1. File bolsters flat.
2. Notch car ends up to platform.
3. Enjoy a cool, long smoke out on the deck.
4. Cut away a middle section of underframe to clear the coupler boxes.
But the cool thing is that the FVM 50' boxcar underframes are interchangeable with the MT 50' boxcar underframes. So, does FVM plan on offering these as a separately available part?