high strength, positional linear actuator

I read your original post yesterday before you added all the edits, and it's only because INTP mentioned that there were edits that I went back and read them.

Etiquette on any forum is to add further info in new posts in the stream so that folk coming back can see the new stuff, since they wouldn't normally know to go back to the top. Apart from that, adding stuff in earlier posts destroys the sense of the thread, since replies between the edits will be to do with the older un-edited opening post, and may be rendered nonsensical after the edits. (That said, at least you marked them as edits and didn't just sneak them in.)