Don't know right now what decoder. You did not say if you want sound.
Be advised, the MDC Shay can be a real bear to build and get it to run properly according to different post I have read in forums. Below are some links to the issue. Someone has wriiten a book for this issue but it is a little pricey. I believe some of the items for upgrade are available from NWSL.
http://www.amazon.com/Mdc-Shay-Handbook-Jeff-Johnston/dp/0964752115
http://www.google.com/search?hl=en&ned=us&q=mdc+shay+running&btnmeta%3Dsearch%3Dsearch=Search+the+Web
Good luck.
Rich
If you ever fall over in public, pick yourself up and say “sorry it’s been a while since I inhabited a body.” And just walk away.
Any advice on how to install a decoder in a two truck Roundhose Shay, (HO scale Kit # 360)? I am about to prepare the kit for assembly, it has been in the box for the last 15 years.
Thanks