Although never owning any, I've always been a big fan of the hobby train sets since I was very young. Another expensive hobby as you said Brett, but it's interesting to hear about the massive savings going direct to Walthers. If only the internet was what it is now when I was in my teens....
During my recent trip to Sydney I had a good look at Hobbyco in the Queen Victoria Building. There is so much cool stuff there, including many model trains and all the accessories you can imagine.
Your mods sound interesting,and will add a real personal touch. Looking forward to the photo's