I agree, Anthony,
The ELMO ST-1200 has been my most trusted Super-8 film projector since the early 80s. It just works and the only thing you have to do (with ten-year intervals) is to sometimes buy new drive belts (available on eBay). I also own the Beaulieu 708 stereo, but that is a more delicate machine, you have to watch it while running, as it sometimes loses the loops. It takes larger reels, though, up to 720 meters.
I have also recently bought an ELMO ST-1200 HD 2-track, cheaply off eBay, which I will renovate and equip with a fine new long zoom lens, the ELMO 1.2 25-50mm. If you have a separate balance track on your film, it can function as a sort of stereo projector.
All the best from Sweden, Bengt