Thanks Chris,
I've received some good answers anyway. The deflection I was observing in the thin Kirf 12" blades was with red oak. Now I've done a test cutting 1x6 t&g pine at 45deg miter, 30deg bevel, something I've done literally thousands of times with 10" saws. I could only get near perfect cuts 2 out o 10 times with my 2 thin Kirf 12" Freuds (I sh*t canned the dewalt blade). I finally found 6" Amana stabilizers w 1" arbor which I'm sure would fix the problem but I'm considering retuning it and getting the DW717. I need accuracy all the time and the increased cutting capacity rarely.