I'm always seeing Crown Graphics sell in the $300+ range and Speeds usually bring $200 or less. I always thought that the speed with the same camera except with a focal plane shutter. If you didn't want to use the shutter, there was an option for releasing the spring tension and leaving it open for ground glass use. Am I missing something? I've been thinking about getting back into miniature photography (that's a joke, okay?) and am curious about that.