What you need is a set of timer relays set up of in parallel so that when the "wing" goes up, several seconds later, it completes the upper limit switch and when the "wing" goes down, several seconds later, it will complete the circuit for the lower limit switch. I have the parts available to make something work in this fashion from my nokeygo system I was working on last year. If you're interested, I can throw somethign together for you. You pay cost of the parts plus shipping and keep your eyes out for an SRT6 wing for me and we'll call it even. PM me for details.