Thanks so much, Paul. That means a lot coming from you. The upper arm on the WEN I'm using couldn't be altered. The frame itself is a fixed solid piece that runs from the lower arm, along the back, and then along the upper arm. Another issue I had with this piece is the size. The table is rather small and I had to set up a table to hold one end of the piece while cutting. I used one of those old type stools with the screw seat and adjusted it up to the appropriate height. I'd have to swing the piece off the stool to lower one end so I could feed the blade.
My little WEN does a pretty good job and I would highly recommend it for someone wanting to dabble in scrolling to see if it is something they would enjoy. For just over $100, it can hardly be beat. The only problems I've had is the blade clamps which I now buy a half dozen at a time, and the blower bellows which splits after about 10 hours of use. I replaced it once before going to a fish tank bubbler. WEN also offers a 2-year warranty which I consider pretty good for an entry level saw. My goal is to purchase either a Pegas or Seyco. If I could get my money right I would probably go with that new 30-inch Pegas... although I like the larger table on the Seyco.
I encourage you to give this pattern a go. Yes, it's challenging, but very rewarding. Like I mentioned, it took me about 40-hours including the frame but that was on my WEN. I'm sure someone on a saw with an arm that would lift would be much faster switching holes and it would take less time. There were only about 3 or 4 areas that I though were vulnerable so I just placed a piece of blue tape over the areas and continued cutting.