I have some that I haven't really figured out yet. The adjusters you use to adjust the vertical/horizontal pattern are too tight and don't work properly. I think you have to take it apart and loosen a locknut that's under the knob. Problem when you do that is the whole assembly struggles to fit back together if you loosen the nut.

I still want to take them apart again and have another crack at it.

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1985 CA 300D Turbo , 213K mi