i made it but i am confused with the size of paper, how do i know how big the size of J and L width should be? or any size should work? but lets say its too big then after finding the verticle line of those paper straight, how do i find my eye position to put the cue under?
if the width is too...
thank you very much for this post, much appreciated
i have been having this vision problem for years now and cant fix it
i am confused how to build this ! can you share a picture please!