OK Ladies, I'm doing something VERY wrong. I bought this ruler 2-3 years ago and was never satisfied with it. Finally, in frustration, I stuck it behind a door and fogot about it. My problem: I had a hard time inserting the rotary cutter into the slots to do the cutting. It seemed the slots were so close together there was no room to insert he cutter. I tried inserting the cutter at the larger opening at the end of the ruler but I never achieved the smooth quick motion I've seen on YouTube and on Alex Anderson show (before she was cancelled). I bought it after seeing one of her guests use it. Maybe I'm too old to start something new LOL