I had posted some issues and problems with the lower blade clamp on my Poter Cable saw. I, also, stated that I was going to try a hex screw as a replacement, which I did. It worked find and the blade was more than secure however I think it contributed to the vibration on the saw. So I went back to the plastic headed thumb screw supplied with the say however is created a wooden turning knob like the one Steve Good has on the upper clamp of his saw.
Now when I insert a new blade I will hand tighten the screw then slip this little turning device on and finish tightening it for better grip. So far it seems to work fine and the vibration is back down. I still beed to find out what I can do to control a little more vibration to my satisfaction. But that will wait till tomorrow.
-- Just learning the craft my Lord and Savior Jesus Christ practiced.