I used to freak out when I saw my Lqs owner take our 44"folded fabric and then fold it again bring the fold from the bottom to the selvage.....I thought, OMG, there is going to be a "V" in it......it didn't happen.
So I went home and tried it. I did not starch, just folded where there was the four layers, smoothed, and smoothed, then cut the end to square up. My secret is using the June Taylor slotted template ruler.....you don't pick up the ruler and moving it each cut. This big square template slotted ruler lays on the folded fabric....line up the fabric fold on the bottom line, insert your rotary cutter into the desired strip slot measurement and cut. cut, cut....up to 9 strips without moving the ruler. It comes in different sizes. Watch for those Joann sales and coupons.
D in TX