Hi Jim, seems to me that once you start tightening your arbor nuts,it's gonna throw your mdf "blade" out of alignment.Do you have room for blade stiffeners? May help keep it straight. Let us know how it goes eh Jim?
Years ago I bought a master plate to for table to blade alignment. Works really well eliminates any variance between blades. I thought I was really smart, until now... mdf is a great idea, wish I had thought of it and saved my $60.00.I'm checking my table saw blade alignment. Instead of doing the alignment with a saw blade I am thinking that a piece of 1/2" MDF might make a good alignment plate....should be dead flat. Your thoughts?