Neil, thank you so much the pictures are great!
One thing that bothered me about my model is that I couldn't extend the bucket all the way out if i wanted to and all full scale cable backhoes seem to be able to? And now after seeing your pic I realize what is wrong...the top pulley arm mount pivots just like the bucket pulley arm, I have mine solid mounted... Doh!
The other thing that I didn't like about my model was that the top (hoist) cable lifts out of the pulley when you raise the boom too high and after looking at your picture I see that the full scale Unit has a small drum on top of the auxiliary boom that keeps the cable from raising up!
Thanks Neil! Two thumbs up!