I purchased the extension kit for my newly purchased DW716.  I've been borrowing my father in law's DW705 and he has the extension kit for that model which is great - it stows neatly under the base of the saw.  Not so with the DW7080 extension kit and the DW716 (both are advertised as being compatible).  I couldn't believe that it doesn't slide under the base more than a few inches.  This is practically useless since I don't always want 20" sticking out the side of the saw.  Others noted the same issue with their model saws.  If it stowed it would be perfect, but it doesn't and I'm dissapointed.  Also, the screws are self tapping which explains some issues other people described in their reviews.  I didn't have any issues, just a little annoying but not a big deal since the instructions explained this.