Native Helpers Lines are only straight lines!

So..

Default of the simulated dashed lines is the physical holes and not the same gap between Offseted curves!
(will be an hard work to have the same gap)

So best is used colored curves as Helpers Lines! ;)
And the Offset is the real Offset! ;)
And can be hide with a simple one click on the toggle "Eye" of the Style Color Browser section! ;)
What do you want more ? :)