I have had my 40-690 Delta for about 2 weeks and absolutely love it. I started scrolling about a couple of months ago after finding a old saw that belonged to my dad. I haven't had this much fun in a long time. The one con I have about the saw is that the arm does not lock in the up position. So I cut a pieces of 3/4 inch pine, attached a magnet to it and hang it on the front of the stand leg.
When I am doing fret work, I lift the arm, slide the wood under the arm to hold it in place thus freeing up both hands to hold the blank and feed the blade. Remove the wood piece and put it back on the stand leg. simple.......