This design is based on a standard gauge Ruston & Hornsby DS48 shunter, and although
small, is actually slightly over-scale – especially lengthwise!  That said, I don’t 
think it’s feasible to reduce the length without loosing structural integrity.  There 
are already a few dubious attachments – especially the tiles covering the motor bogie 
and part of the footplate. The CAD file should make this all clear – and is stepped 
to allow reconstruction if desired!

While largely my own design, inspiration for the buffer beams was found here:

http://www.brickshelf.com/cgi-bin/gallery.cgi?i=1206258

Any comments, please e-mail me at mrrjbrown1@hotmail.com