eswube sniped me but still.
@eswube, inside cylinder locos don't have any discernible external running gear other than the reversing lever generally.
That looks like something from a kids train-set...
Firstly, I've NEVER seen a brass safety valve cover on a German loco.
Secondly, an 0-8-0 is not small by any standard.
Thirdly, I'm guessing that your design is an inside cylinder design? If so why?
Fourthly, You aren't going to need smoke deflectors on a tank engine.
Fifthly, your wheels need spokes or if using Boxpok wheels more holes than real spokes.
Sixthly, you have what look like solid under-frames which means oiling up is going to be a pain in the arse
Seventh, You don't appear to have any discernible buffer beams
Eighth, Round top boiler? I see no discernible firebox / grate area
Ninth, why do you feel the need for wheel spashers when you don't have wheels protruding through the running plate?
Tenth, not all of the wheels have identical balancing weights on a loco. AFAIK the actual driving wheels have the larger weights.
I direct you to the following image.