I don't use any of your methods. I don't care if the lines are straight or not but 95% of the time my cuts turn out being pretty darn straight anyway. Go figure.
I use a utility knife on plastic & just wing it. https://www.uline.com/Product/...
I am a strong believer in the simple fact is that what matters in this life is how we treat others. I think that's what living is all about. Not what I've done in my life but how I've treated others. ~~ Sharon Brown
