I have two Elmo 16CLs. One with a slight take up reel issue which I have at home, and a newer one at the cabin. The newer one is a magnetic and optic, while the old is just optic.
In the late autumn I discovered it had started to get the goo problem. The rollers looked fine when I got it, but I guess I should have checked it better. The goo had started to leak at the sides from the inside near the core. The outer center looked fine, but I discovered some sticky stuff at the very side of my film. Not good at all! No more film was run throught this until it was cleaned and with a new set of rollers.
The problem was that I had not thought about that the magnetic one had more rollers than the other. So the set I got was not enough. Most sets I found on eBay was for 16CL without further specification. But I ended up with a rather expensive set from Germany that specifically stated it was good for the M+O.
The set came in a very nice package. It had a great metal box, and inside there was a good instruction included with markings of each roller with the accompanying part number for the roller. Each roller was in a small plastic bag with a part number. It even had extra tools if needed.
The only issue was the roller for the magnetic sound head. It was hard to get out, but I found a good instruction video from Larry Urbanski on YouTube that explained it very well, so I managed to get it done.
I am very happy to have it up and running again!