I've been stuck on this level for a month somehow and just got it today. Well played. I guess I deserve that one for trying to solve based on how I think you build levels.
Edit: nevermind, confused this level with Satisfaction.
Dear David Spencer from 14 years ago: This is an intervention. We need to talk to you about 10x10 levels that use this trick. Is there something we could do to help you overcome your addiction?