Thanks for all the comments! It did take me quite a bit of time to work everything out and get it made, but I get satisfaction from making something myself.
After a few of the comments I think that the ball end on the screw will stay.
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As promised here are the dimensioned drawings.
I added a link for a PDF file of the arm template. It should print out pretty close to proper scale. Just make sure that you select none for scaling on the printer screen.
is it possible, to redo without the black background??? please?? cant read it,,at the size the printer prints it..thanks.