Thanks so much for the assistance.  I am sure I followed the recipe exactly.  I used high end heritage Berkshire pork and back fat and Piedmontese chuck.  I agree, the photo and the product look like much more than 20%.  I checked the total weight at the end to ensure I had the right total at almost exactly 5kg.  The grind looked great.  Same as I use for fresh sausages and the texture is always how I like it.  I have never run back fat through it however.  I do recall that it might have looked more like lard than a grind and it was a frozen too.  I used the 3/8 plate for the fat and pork and the 1/8 plate for the chuck. The beef chuck was not overly fat either.  It does taste really good so it wont go to waste!  Again, thanks guys.  Really glad I found this forum and I appreciate the help and advice.