Question 1 : You right : for be tangent you must have Control Points Aligned
Maybe you can use these free one for post your images! ;)
https://imgbox.com
Use the "Full Size" then copy a part of the link (BB Code) with a little change
[IMG]https://images2.imgbox.com/ad/18/s4CjL47H_o.jpg[/IMG]
becomes for this forum (without the " " after the "<" )
< img src="https://images2.imgbox.com/ad/18/s4CjL47H_o.jpg"/>
so

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