Hi Will:
The MTZ (Mark Twain Zephyr) was last year acquired by WGN (Wisconsin Great Northen), moved to Trego WI, and is being restored to service by WGN.
Because of a separate thread on the WGN's restoration and the fact that O scale MTZ models have been produced by 3RD Rail, Lionel, & MTH, there may be interest from other forumites in the acronym MTZ.
Only my suggestion. RTR12 can add or ignore my suggestions as he sees fit.
Thanks in advance !!!