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tweenie question: focusing fresnel maintenance
I have a Mole Tweenie II, 650 watt fresnel, with a very “sticky” focusing mechanism. The “screw” side seems fine, but the assembly seems to hang up on the opposite rail. I know this seems like a small thing, but it’s annoying. Can I grease the rails with something, and if so, what would be the proper (non-flammable) lubricant?
Thanks!
— Bob C