My two cents. Sometimes its not clear exactly what falls into category. Obviously HONGZ, Electrical and Technical are explanatory. But what exactly is Tin Plate (its also three rails)? What is considered scale (exactly 1:48?, how about 1:50 or 1:43?) Etc, etc. Since Rich says customizing is expensive there is probably no easy way to bring up a definition when you click on forum topic catagory to insure your post is really in right place.