Dear RTR12,
Thanks, I think. I read through the entire thread, twice, and my head hurts while it spins. Even GUNRUNNERJOHN, who I consider to be the "Gold Standard of 3R Tech", questioned:
"HUH? Is English your first language? "
I went to Mark's webpage, followed the instructions and downloaded the "Protosound" file for the P&LE Geep easy as pi... Then I went to the webpage for my long-coveted SIRT S-2 (http://mthtrains.com/20-20067-1), clicked on "Protosound" and got a psychedelic very large array of question marks enclosed in black diamonds. Answer: the Black Diamond was a passenger train on the Lehigh Valley, not the P&LE or the SIRT. However, I can't imagine how that could be relevant.
I think I'll just play it safe, turn off the cab chatter, provide my own smart-alec remarks in authentic Staten Islandese and wait for an SIRT S-2 to appear for sale here or on the bay.