I have added a new Drive Pump and new Draincocks on my GWR 1500 Class (Speedy in LBSC's world).
The original report was written in the German language, and I was too lazy to translate it for the audience over here.
That is why I just add a link
http://forum.dampfbahner.eu/wbb3/index.php?page=Thread&postID=35918#post35918to the location where my write-up now is. There are lots of pics, so you still might grasp it, even with a German text.
Reading in German might widen your horizon ;-)
If there are still questions, then I'll answer here...
Johannes