I just don't understand how a little thingie with a timer and a motor that lifts a light piece of aluminum or wood cost so much money. Cheapest option is the add a motor at $90. But after that the prices seem to run in the 180 - 324.99 (!!!!) range. Seriously. I can buy a remote control helicopter that actually flies for $20 on amazon (I did and it's cool). You can buy a thingie on amazon that is a remote control vehicle that kids can drive around the house and spy on people with for $70. You can get a toy crocodile that sings and wags its tail when you walk by it for $14. So why, why, is a little gizmo that lifts something on a timer a gazillion dollars :? It makes no sense to me. I've been looking into making my own for less money, but I have no knowledge of mechanical and electric things. Instructions I've seen involve the word "solenoid" which makes me shudder, I'd have to find out what one is and what to do with it. I've seen nifty's posts about making one, and I'm looking at this guy's alarm clock opener here: http://blog.stead.id.au/2010/01/building-automatic-chicken-door-opener.html But I have to say that if a company came out with a very simple option for $40 or under they would make a killing. Why doesn't somebody do it ?