There were pics on the other site of a small cat, maybe a 26 nordic, or dcb that had a single number 6 running big power, and it had a sick carbon cover on the back of the drive that covered the aerator tube.
http://www.smarthome.com/2499B1C/SmartLinc-INSTEON-Wire-In-Starter-Kit/p.aspx
this seems to be pretty close to what you are looking for. From the sound of it, it seems rather easy to hook up as well. I would love one of these for my cottage so we could turn the heat and lights on before we...
My father has pictures of when they blocked it off. He was 17 at the time, and thought it was a good idea to climb down in there. We do have a very large quartz rock that he carried out of the bottom though sitting at our cottage near the falls.
I had to snorkel a few times with nurse sharks for work. they are no problem, they want nothing to do with you. If you go to compass cay in the bahamas they come up on the dock in high tide, and you can pet them. pretty cool