Walschaerts valve gear

My model of Walschaerts valve gear some parts are imaginary and some are impossible to assemble, but it represents basic idea.
Special thanks to Bryan (2nd Class Steam Engineer) who provided me with some useful scans.
/ s16100
Sounds are from:
www.railwaysoun...
www.sounddogs.com/
May 2013 Update:
Recently I got a request for files/parts used to make this video so here they are:
drive.google.c...