Hi Fred,

Sorry if I stirred up a bad rumor, when someone was trying to sell one several months ago, someone else jumped on and said there were problems with wings prior to #24. We cannot find anything (I have 22 and my friend Rob has 21 I think)

As for you theory, as I said in the first post, that is what I think it is. I think the system will work if the air can be removed, but not with high reliability.

I am working on some ideas, if I can get Rob to start work on his, then maybe we will get something working with limit switches