In a few cases, there are files that are provided in the book for reference.  And some times the files are not exactly correct, or could be adjusted to improve there clarity.  Specifically in the group meeting this year, I requested that the Rib Example models be brought back.  And while I have my own copy of them, I have to admit that I had to change them to make them more clear.  For example Rib2 shows a rib plane, however the sketch for the rib is atop the face by a boss that the rib is joining to.  Also one of the things that we are explaining is that ribs don't require a filly defined sketch, but no why(?)...  By adding draft to the middle boss and dropping the rib sketch plane, it becomes easier to explain how or why we are not able to fully define the sketch all the way to the all of the boss with out a gap or going past the wall.  But that the rib sketch despire being short or 'under defined' still completes with out a gap.  Aside from this, it is a DARK purple, and very hard to see on the projector.  With a little re-work these files still work great.

I suppose the same question goes for submitting new sample models for consideration of inclusion to show topics.