Would this fit here?
A fictional boxcab I drew up based on the main chassis of a Pennsylvania Railroad GG1 and a body from some cabooses (cabeese?) lettered for a fictional railroad I'm thinking up. Heavily inspired by the works from this site.
Here are a few “One of a Kind” locomotives I found.
https://www.ebay.com/itm/Athearn-HO-Penn-Central-Kitbashed-Dash-SD-Dual-Cab-Diesel-Locomotive-1-Of-A-Kind/333827242788?hash=item4db9a77b24:g:YdgAAOSwLYVf0SPp
https://www.ebay.com/itm/Athearn-HO-Delaware-Hudson-Custom-Kitbashed-C-Liner-Dash9-Diesel-Locomotive/233833963429?hash=item3671971fa5:g:6ckAAOSwudRf5NaJ
https://www.ebay.com/itm/HO-Scale-Custom-Built-Painted-Baby-Face-A-Unit-Diesel-Locomotive-Engine-Tested/333827660253?hash=item4db9add9dd:g:Cc8AAOSwtDNfyBrY
https://www.ebay.com/itm/Athearn-HO-Chessie-System-PA1-Dual-Cab-Kitbashed-Electric-Locomotive-1-Of-A-Kind/333827153827?hash=item4db9a61fa3:g:xAQAAOSwx8NfpZcJ
How could the ICE 1 and X2000 demo trains operate on the Amtrak NEC when they operate at 15 kV 16.7 Hz AC and 25 kV 50 Hz AC and the NEC uses 25 kV at 60 Hz AC, 12.5 kV at 60 Hz AC, and 12 kV at 25 Hz AC?