Hi, does anyone have the Artograph Designmaster Projector for using with cookies? I'd like to get one ($170, free 2 day shipping on Amazon), but I'd like some user reviews first. I saw some here, but they didn't answer my questions, which are...

Is the image sharp enough or is it really blurry? Sharp enough to pipe or draw fairly simple images that I can't freehand?
Does the clamp work well on a kitchen table?
Does it work the same way as a Kopykake (first get the image in focus by raising the tube up/down and then get the size by moving the lens)?

Any help is much appreciated! I've been researching this for a while, just need some cookie user reviews before pulling the trigger... thanks!