I finally got a roller foot on my machine!

[SheltathaLore]

After looking at the parts diagram, it seemed to be the thread wiper that was in the way... which apparently I had never even turned on since I bought the machine, so clearly it wasn't critical to my workflow.  Taking it off made room for the foot, although it also somehow messed with the lever foot lift and the auto foot lift (knee lift still works, which is what I primarily use in any case).  The only other thing I needed to do was raise the needle bar - not a biggie.

My thread size is wrong and I still need to swap out the feed dogs and throat plate, but I was too hyped to start playing with it. :D  Now I just gotta practice, practice, practice!