Actually, your text explanation is well written and do understand it. It is mostly how I have it drawn out on paper, except for the diode instal, which I had not thought about, but my scanner/printer is broken or I would insert an image.  I can get a couple HD normally closed push button switches, but I'm still a bit confused on the diode location. Would the diodes criss-cross between the limit switches? One going going up and one going down so to speak? Thanks.