This was my first attempt at building an antenna. I got the design from The Antenna Elmer Webpage. There wasn't a lot to go by as far as details on construction so a lot of trial and error taught me a lot about antennas. Here's their Construction Tips, but the title of the page is "Under Construction" so I hope that means they'll be adding more.
I found I had to put a short (2-3 foot) length of coax stub off the elements and cut small pieces off until I got a good VSWR. (I never could get better than 1:1.7, and ended up with a pile of 1/2" lengths of coax on the floor of my shack.) Consequently I've never used this antenna. Perhaps I'll take it off the shelf and tinker around with it some cloudy day.