If the JJ's won't be used for 70mm, (at least in the near future) some people like to remove the shaft coupling that drives the sprocket in the 70mm mag head. Store the coupling in the mag head, taped down. Actually, since the mag head is really only needed for, well, mag, you might just take it off. Mount the 70mm DTS head there instead, if you can figure a way to easily bypass it for 35mm. Normally, I might leave it, but who will run mag anymore and with all these penthouses and readers, short people will have to reach up to thread.

If you also have the magazines, remove the magazine itself, but keep the reel arms, if you can (things sometimes get messy trying to mount DTS readers and reel arms.) You never know when you might need to run reels.

Buy one extra 70mm pad roller to replace the one above the gate (when running 70mm.)

In the back of the intermittent, there's a hole on the casting to fill it with oil (there's one in the front, too, but no one seems to use it.) They make a felt plug to insert in the hole, to keep oil from comming out. I notice many people loose the plug, throw it away, etc. because they think it's not needed, but I suggest you use it. Alot of oil does splash out while running.

Is it water-cooled? Maybe now is a good time to flush it out with an anti-calicum chemical.

Mark is right about the intermittent sprocket; I forgot about that. I used to put regular 35mm sprockets back in after running 70mm. The intermittent sprocket pad shoes are an assembly that can be pulled out to clean, or change to 70mm. Once where I worked, an operator removed the 35mm assembly to clean (with a 35/70mm sprocket installed), but did not push it all the way back in when done. He locked it, but one shoe was really sitting directly on top of the sprocket teeth. He started the machine, and all the teeth on one side went goodbye. In 1983, that was a $125 part. If a sprockets gonna get wiped out, might as well be a 35mm only.

Does your machine have the heat filter holder? Did anyone ever find a source for these? I had problems getting them from Century, even back then. I ordered them three times, and always got square ones, but I had round-shaped holders. They were going through bad times, then. Everytime I called, someone else had quit.