I have been using the lifter on the upper arm on my DeWalt to hold it up when I move the blade. It works great. I went to lift the arm so I could move the blade and the arm wouldn't lift high enough. I didn't want to force it so I took the back cover off to see what was hanging up. I couldn't find anything wrong. I tightened a couple of things and put it back together. I started the saw and it runs more quiet now. I didn't really have any vibration to speak of before but I have even less now. I didn't even bolt it back down to the bench and cut my cross out with no problems. The best part is now the upper arm is stiff and will stay up on it's own without the lifter, just like the Excalibur does. Sorry for the long post I am just very happy with the changes to my saw and wanted to post this to let you know of the possibilities.