So I have been doing a little reasearch on pei and for the most part it sounds like a cool upgrade. Right now I am using glue sticks. Painters tape I had to replace after every print. Never really tryed hairspray but I don't want to risk damaging any parts. But I heard about pei and it seems like a good upgrade especially when I am trying to do some wirless printing. I was just wondering of people's general thoughts on it. There are three packages on amazon one 8x8, 10x10, and 12x12 pei sheets which one should I get so that if fits my print bed?