I had so many requests for pictures of the DYI Hatch Latch I posted a
picture:
http://home.ix.netcom.com/~lbusch/Hatch Latch3.jpg

If you need a comparison to the commercial version I have a picture of this
setup side by side with one of the commercial versions, courtesy of Larry
Chase and Roadhaus.

But mine is adjustable! (Not really a needed feature, but nice)

BTW, I can't take credit for this.  A member of one of the lists mentioned
using a couple of eyebolts and a coupling nut.  When I went looking to put
that together I ran into this setup.  And for the life of me I don't
remember who should be getting credit for this, but thanks.