I just bought a version of this saw, Jet JSS-16, my first scroll saw, and the first thing I did was bin the guard and the foot. For the air blower, I got a piece of brake pipe a couple of inches longer than the original air blower nozzle, and bent it so that it was blowing the dust back and to the right. The bellows are small and weak, but with the brake pipe attached, it does work much better as you can get it nearer.
One thing I noticed about this saw is that it is difficult to get the blade back in exactly the same place every time you release the top clamp to pass the blade through a hole, requiring it to be retensioned every time. Maybe it's something I would get used to, but I am thinking of either making two new clamps that will allow me to easily locate the blade, or adapt the originals. I have an idea that might work to do the latter, when it's warm enough for me to get into the garage again. I'll also make new screws with handles to do away with the allen key to tighten the clamp.