The rebuilding of extinct steam locomotives are a fairly new concept to the steam preservation world. With British railway building a LNER Peppercorn Class A1 60163 AKA Tornado built between 1994 to 2008. We can see rail fans following in British Railways footstep and build other extinct locomotives. Below is a list of locomotive being built.
http://www.lms-patriot.org.uk/loco-progress (LMS PATRIOT)
https://www.theclanproject.org/ (BR Standard Class 6)
https://www.p2steam.com/ (P2 2-8-2 Mikado)
http://www.cockothenorth.co.uk/ (Streamlined P2 2-8-2 Mikado)
http://www.82045.org.uk/ (BR 3MT 2‑6‑2 82000)
Now all the above are British. The only American Locomotive Trust is the T1 Trust.
But that's not the point. The point is there have been several rumors that the T-1 is being built to beat the A4 Mallards Steam Speed record of 126 MPH . But, is that really a good idea? Is it really ethical to rewrite history of the in the 21st century? In my opinion build the T-1 BUT DONT try to beat the world steam speed record set by the A4. Tell me your thoughts.
YouTube video about T-1 beating steam speed record: https://www.youtube.com/watch?v=RSGyVkeDGg4