Gas Struts for Folding Foamie

I'm playing around with an idea of making an A framed folding foamie. I read a post recently where someone mentioned using a gas strut to unfold their foamie. Since I don't have any experience with gas struts, I was wondering if anybody here has used them before for their camper. If you have, then I'd like to know a few things like the size of the struts you used, how much it could lift, price, and best place to get them. Also, any warnings or tricks of the trade you could share.
Thanks,
Dave
Thanks,
Dave